| 25.21 | announcement | Patch 25.21 mode announcementThe official dev blog confirms ARAM: Mayhem as a new mode coming in Patch 25.21. | official | Riot Games |
| 25.21 | mechanic | Four to five augments define the match progressionPlayers choose one of three augments at match start, then receive more offers at levels 7, 11, and 15, claimed on death. | official | Riot Games |
| 25.21 | design-origin | Prototype lineage from Wild Rift AAA ARAM and ArenaRiot cites Wild Rift AAA ARAM and Arena’s buildcrafting as inspirations, with the prototype built by bringing Arena augments into ARAM. | official | Riot Games |
| 25.21 | content | 40+ new augments and Mayhem-specific designsRiot describes many returning Arena augments, more than 40 new augments, and lane-specific designs such as King Me and Snowball augments. | official | Riot Games |
| 25.21 | clarity | Persistent effects reduced for 10-player fight readabilityThe dev blog explains that persistent Arena-style effects were removed or retuned because 10-player ARAM fights need clearer readability. | official | Riot Games |
| 25.21 | queue | Standard ARAM remains, Mayhem gets its own queueRiot states that standard ARAM is not going away and ARAM: Mayhem runs as a separate queue during its availability window. | official | Riot Games |
| 25.21 | announcement | New Act 2 modeThe TL;DW confirms ARAM: Mayhem as a new game mode coming in Act 2. | official | Riot Games |
| 25.21 | mechanic | Arena-style augments enter 5v5 ARAMRiot frames the mode as bringing Arena-style augments, plus new ones, into familiar 5v5 ARAM. | official | Riot Games |
| 25.21 | queue | Separate queue, not a standard ARAM replacementRiot says ARAM: Mayhem has its own queue, leaving standard ARAM available for players who do not want augments. | official | Riot Games |
| 25.21 | map | Butcher’s Bridge and Koeshin’s Crossing become permanent ARAM additionsThe same update says Butcher’s Bridge and Koeshin’s Crossing become permanent ARAM additions after positive feedback, forming part of Mayhem’s map-rotation context. | official | Riot Games |
| 25.21 | launch | Live launchPatch 25.21 notes confirm ARAM: Mayhem goes live in this patch. | official | Riot Games |
| 25.21 | rules | 5v5 single lane plus augmentsRiot describes the mode as standard 5v5 single-lane ARAM with an extra augment layer. | official | Riot Games |
| 25.21 | schedule | Planned through 25.24The launch notes state that the mode is planned to stay live through Patch 25.24. | official | Riot Games |
| 25.21 | test-cycle | Separate queue testThe PBE feedback thread frames ARAM: Mayhem as a separate queue test rather than a replacement for standard ARAM. | pbe-feedback | Riot QA / LeaguePBE community |
| 25.21 | mechanic | Augment offer cadenceAugments are selected at match start and levels 7, 11, and 15, which defines the first-version cadence. | pbe-feedback | Riot QA / LeaguePBE community |
| 25.21 | content | Returning Arena augments plus 40+ new augmentsThe test thread says many Arena augments return and more than 40 new Mayhem augments are added. | pbe-feedback | Riot QA / LeaguePBE community |
| 25.21 | map | Uses the current ARAM map rotationThe test thread says the Season 2 ARAM map updates are part of ARAM: Mayhem’s map rotation. | pbe-feedback | Riot QA / LeaguePBE community |
| 25.21 | feedback | Collects augment, mode, and bug feedbackThe thread acts as the first PBE feedback hub for augment, mode, and bug reports. | pbe-feedback | Riot QA / LeaguePBE community |
| 25.22 | augment-balance | First augment balance passOverperforming options such as Draw Your Sword, Dual Wield, Ocean Soul, and Swift and Safe are tuned down, while weaker or awkward augments such as Glass Cannon, Laser Heal, and Master of Duality receive buffs. | official | Riot Games |
| 25.22 | augment-functionality | Augment functionality updatesSnowball Roulette, Ultimate Awakening, Upgrade Mikael’s Blessing, and related augments receive new functionality or rule updates. | official | Riot Games |
| 25.22 | mode-feature | Custom ARAM: Mayhem gamesPatch 25.22 adds the ability to create custom ARAM: Mayhem games. | official | Riot Games |
| 25.22 | aram-qol | ARAM map quality-of-life changesBilgewater Power Flowers, Bilgewater Cannon, and Koeshin’s Crossing quality-of-life changes apply to both standard ARAM and Mayhem. | official | Riot Games |
| 25.22 | bugfix | First live bugfix passThis patch fixes issues including shapeshifters gaining extra health, Laser Heal interruptions, negative movement speed with With Haste, blank Nightstalk tooltip, Slow Cooker tooltip errors, and Viego refreshing Goldrend cooldown. | official | Riot Games |
| 25.23 | system | Early augment rarity cadence changesRiot lowers the frequency of silver augments in the first offer and prevents back-to-back silver augments in the first two rounds. | official | Riot Games |
| 25.23 | map-system | Bloom Portal changed to click-to-teleportKoeshin’s Crossing portals change from touch activation to a traditional instant click-to-teleport interaction. | official | Riot Games |
| 25.23 | system | Stat Anvils added as late-game gold sinkSilver, Gold, and Prismatic Stat Anvils become purchasable after level 9 for 750 gold, excluding the Shardholder Value Shard. | official | Riot Games |
| 25.23 | pacing | Late-game pacing adjustmentsDouble super minions are removed and passive XP/gold values are adjusted to reduce early endings and late-game stalls. | official | Riot Games |
| 25.23 | augment-balance | Augment mechanical updatesBlunt Force, Gash, Lightning Strike, Protein Shake, Self Destruct, Snowball Roulette, Steel Your Heart, Repulsor, Urf’s Champion, and related augments are buffed or reworked. | official | Riot Games |
| 25.23 | champion-balance | Small champion-specific Mayhem modifiersCho’Gath, Maokai, Nasus, and other champions receive Mayhem-specific damage or durability modifiers. | official | Riot Games |
| 25.24 | champion-balance | Brand-specific Mayhem nerfBrand takes more damage in Mayhem and receives a larger ability haste penalty. | official | Riot Games |
| 25.24 | item-balance | Heartsteel buffHeartsteel gains a higher damage-to-max-health ratio. | official | Riot Games |
| 25.24 | content | Arena prismatic augments addedEarthwake, Orbital Laser, Trueshot Prodigy, Cerberus, Pandora’s Box, Stackosaurus Rex, and related Arena-style augments are added with Mayhem pacing limits. | official | Riot Games |
| 25.24 | augment-rework | Ultimate Awakening reworkUltimate Awakening keeps its ultimate-to-basic-ability fantasy and now refreshes basic abilities after casting ultimate while granting a large temporary basic-ability haste window. | official | Riot Games |
| 25.24 | item-content | Two Arena items addedHextech Gunblade and Sword of Blossoming Dawn are added to Mayhem, enabling new hybrid damage and healing patterns. | official | Riot Games |
| 26.1 | hotfix | 26.1 weekend quick fixesThe January 9 update includes ARAM: Mayhem quick fixes alongside early Season 2026 follow-up changes. | official | Riot Games |
| 26.1 | item-disable | Bastionbreaker disabledBastionbreaker is disabled in both standard ARAM and ARAM: Mayhem. | official | Riot Games |
| 26.1 | augment-disable | Executioner and Flashy temporarily disabledExecutioner is temporarily disabled for Gangplank, and Flashy is temporarily disabled while bugs are resolved. | official | Riot Games |
| 26.1 | bugfix | Duplicate augment and shop issue fixesRiot fixes duplicate stacking augment rolls, a two-Stormrazor shop issue, Zeri attack-speed-cap behavior, and related bugs. | official | Riot Games |
| 26.2 | bugfix | Shared ARAM and Mayhem portal fixesFixes Hexgates failing to teleport behind turret and Koeshin’s Crossing portal interactions being interrupted. | official | Riot Games |
| 26.2 | bugfix | Glass Cannon and Bloodthirster fixFixes Glass Cannon preventing Bloodthirster from triggering. | official | Riot Games |
| 26.2 | bugfix | Augment and champion interaction fixesFixes Smolder Q with ReEnergize, Flashy/Flash 2 canceling Fiddlesticks R channel, Empyrean Promise range, and similar interactions. | official | Riot Games |
| 26.2 | bugfix | Snowball and economy tracking fixesFixes Snowball Upgrade / The Biggest Snowball triggering Aurora and Zaahen passives, plus First Strike gold tracking in From Beginning to End. | official | Riot Games |
| 26.3 | schedule | Run extendedRiot confirms ARAM: Mayhem will not simply end with the original 25.24 window and is being extended. | official | Riot Games |
| 26.3 | roadmap | Patch 26.03 larger update previewThe TL;DW previews a larger Mayhem update in 26.03, later matching the PBE/live 26.3 augment-set and progression-track update. | official | Riot Games |
| 26.3 | content | 45 new augmentsRiot says Patch 26.3 adds 45 new augments, with some unlockable through the progression track. | official | Riot Games |
| 26.3 | system | Augment sets and progression trackThis patch introduces augment sets and a Mayhem progression track, making it the first major post-launch system expansion. | official | Riot Games |
| 26.3 | hotfix | First hotfix passThe February 5 hotfix adjusts progression rewards, augment hover delay, Poro Blaster, Heads Up Cupcake, Devil On Your Shoulder, and related values. | official | Riot Games |
| 26.3 | bugfix | Early bugfixesRiot fixes issues including infinite Critical Healing/Critical Missile triggers, Prom Queen failing after death, and duplicate augment selection. | official | Riot Games |
| 26.3 | content | 26.03 PBE adds 40+ augmentsThe PBE feedback thread says the 26.03 update tests more than 40 new augments. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.3 | system | Augment sets enter testingThe update introduces augment sets, similar to TFT traits, where selecting multiple tagged augments grants a set bonus. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.3 | system | Multiple set identities and reward directionsThe thread lists sets such as Deathknell, Firecracker, High Roller, Stackosaurus Rex, Wee Woo Wee Woo, Fully Automated, Archmage, Make it Rain, and Snowday with distinct bonus themes. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.3 | progression | Progression track enters testingThe 26.03 PBE post includes a progression track as part of the update alongside new augments and augment sets. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.3 | feedback | Bug fixes and quality-of-life updates tested togetherThe PBE post says bug fixes and quality-of-life updates are part of this cycle, making it an important source before the live 26.3 release. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.4 | system | 26.3 and 26.4 system changes recordedThis patch records a mix of Mayhem changes that went live in 26.3 and additional 26.4 updates. | official | Riot Games |
| 26.4 | system | Augment set hover delay reducedThe Augment Set Panel hover delay is reduced from 0.75 seconds to 0.1 seconds. | official | Riot Games |
| 26.4 | progression | Progression tier 4 reward changedProgression tier 4 reward changes from 300 gold to Golden Reroll. | official | Riot Games |
| 26.4 | augment-balance | Large augment and set tuning passPoro Blaster, Heads Up Cupcake, Devil On Your Shoulder, Speed Demon, Kill Secured, Make It Rain, Archmage, Deathknell, High Roller, and related options are tuned, mostly reducing high-roll payoffs. | official | Riot Games |
| 26.4 | bugfix | Augment selection and effect cleanupFixes duplicate augment selection, overwritten augments, final augment selection failures, Anvils overwriting offers, and Poro King, Firecracker, High Roller, and related issues. | official | Riot Games |
| 26.5 | schedule | No end date yetRiot says ARAM: Mayhem’s run is being extended, with no end date in mind yet, and that players will be told later. | official | Riot Games |
| 26.5 | design-focus | Tank experience focusThis patch systematically buffs health, durability, and frontline-oriented augments so tanks can better hold the line in a high-power environment. | official | Riot Games |
| 26.5 | augment-rework | Wee Woo Wee Woo reworkWee Woo Wee Woo is reworked around a stronger emergency rescue and burst-healing fantasy. | official | Riot Games |
| 26.5 | content | Upgrade Sword of Blossoming Dawn addedUpgrade Sword of Blossoming Dawn is added, creating a new sustain pattern for healing and attack-speed support builds. | official | Riot Games |
| 26.5 | pacing | Nexus and turret health pacing changesNexus base health is lowered and Nexus Tower health is raised to create comeback windows while avoiding abrupt endings. | official | Riot Games |
| 26.5 | augment-balance | Tank and utility augment buffsUpgrade Immolate, Slow Cooker, Celestial Body, Guilty Pleasure, Perseverance, Courage of the Colossus, Adamant, and similar tank/utility augments are buffed. | official | Riot Games |
| 26.6 | design-focus | Continued tank and melee improvementsThis patch continues improving tank and melee experience through champion, augment, and system adjustments. | official | Riot Games |
| 26.6 | champion-balance | Older ARAM modifiers removedIllaoi, Sett, Shyvana, Sion, Swain, Urgot, Vladimir, and similar champions have older ARAM-specific damage, durability, or healing modifiers removed or softened. | official | Riot Games |
| 26.6 | augment-balance | Movement speed compression and new augment buffsMovement-speed effects such as Fire Fox, Ice Cold, Sonata, and Speed Demon are compressed, while Droppybara, Juiced, Triggered Inferno, and related augments receive usability or damage buffs. | official | Riot Games |
| 26.6 | augment-rework | Make It Rain coin payoff reworkMake It Rain now makes enemies drop coins on takedown that the holder and allies can pick up, making the gold payoff more visible. | official | Riot Games |
| 26.6 | qol | Augment usability cleanupRed Envelopes, Final City Transit, Vampirism/Perseverance, Slap Around, summon hat messaging, and similar systems receive quality-of-life cleanup. | official | Riot Games |
| 26.6 | bugfix | Stat Anvil and augment-selection fixesFixes Stat Anvil purchases blocking augment offers, Ornn passive triggering unintended selections, Cheating shop access, queued offering problems, and related issues. | official | Riot Games |
| 26.7 | seasonal | April Fools Poro contentAdds April Fools content such as muscular Poros, greeting chat, Poro Snax visuals, Flash afterimages, and health bars scaling with champion size. | official | Riot Games |
| 26.7 | system | Reduced augment frustrationThis patch focuses on reducing augment frustration and improving champion quality of life. | official | Riot Games |
| 26.7 | augment-balance | Poro Blaster and Void Rift tuningPoro Blaster only knocks back once at 5 Poros and has shorter Poro respawn time; Void Rift gains a per-target cooldown. | official | Riot Games |
| 26.7 | champion-balance | Shyvana fury generation increasedShyvana gains increased fury generation in Mayhem. | official | Riot Games |
| 26.7 | bugfix | Champion-specific interaction and augment usability fixesFixes Prom Queen, Shyvana with Final City Transit, Neeko with Fire Fox, Azir with Minion Mancer, and related augment behavior issues. | official | Riot Games |
| 26.8 | design-focus | Passive and persistent movement speed reductionThis patch continues reducing passive and persistent movement speed from augments so fights are easier to read and opponents have more room to react. | official | Riot Games |
| 26.8 | champion-balance | Mel Rebuttal cooldown increasedMel’s Rebuttal W cooldown is significantly increased in Mayhem. | official | Riot Games |
| 26.8 | item-balance | Defensive and melee-support item cooldowns loweredImmortal Shieldbow, Locket, Maw, Protoplasm Harness, Randuin’s, Shurelya’s, Sterak’s, and similar items receive lower cooldowns. | official | Riot Games |
| 26.8 | augment-balance | Movement speed and damage augment tuningFan the Hammer, Giant Slayer, Movement Speed Stat Anvil, Homeguard, Red Envelopes, With Haste, and related options are nerfed or adjusted. | official | Riot Games |
| 26.8 | system | Health Relic and damage-level responseRiot responds to overall damage levels through item buffs and Health Relic system improvements. | official | Riot Games |
| 26.9 | champion-balance | Bard and Ornn time-based ability adjustmentsBard W movement speed and ammo cooldown are improved; Ornn passive cooldown changes from fixed 120 seconds to a level-scaling value. | official | Riot Games |
| 26.9 | system | Health Relic AoE effect buffedHealth Relic pickup values stay unchanged, while the AoE missing health/mana restore increases from 16% to 22%. | official | Riot Games |
| 26.9 | augment-balance | Small augment balance passUpgrade Sword of Blossoming Dawn loses its basic-attack damage penalty, Prom Queen cooldown is increased, and Grandma’s Chili Oil damage/healing is reshaped. | official | Riot Games |
| 26.9 | bugfix | Large Mayhem interaction bugfix passFixes interaction issues involving Lightning Strikes, Item Haste, Overflow, Clown College, Buff Buddies, Marksmage, Dropkick, ReEnergize, Pinball, and more. | official | Riot Games |
| 26.10 | qol | Augment and map quality-of-life improvementsThis patch focuses on augment and map quality of life, improving Upgrade Zhonya’s, Fan the Hammer, Big Brain, Outlaw’s Grit, and related options. | official | Riot Games |
| 26.10 | augment-qol | Key augment usability updatesBig Brain refreshes on respawn or timer; Fan the Hammer no longer triggers on minions; Outlaw’s Grit stacks reset by 15-second duration and show on buff bar; Upgrade Zhonya’s grants movement speed during stasis. | official | Riot Games |
| 26.10 | champion-balance | Viktor Mayhem and ARAM updateViktor gains smoother passive stacking on ARAM maps: takedown and cannon stacks are reduced, and he gains stacks over time. | official | Riot Games |
| 26.10 | map-qol | Bilgewater Cannon control improvementsMovement lockout from not taking the Cannon is shortened, and landing movement lockout is removed. | official | Riot Games |
| 26.10 | bugfix | ARAM: Mayhem bugfix batchFixes Dropkick reveal, Qiyana element selection, Cannon triggering relics, Snowball upgrades, Marksmage, Outlaw’s Grit, Gangplank, clone/snowball/Ultimate Awakening, and many related issues. | official | Riot Games |
| 26.11 | scope | Small Mayhem patchRiot frames this as a small Mayhem patch with a handful of champion changes and general bugfixes, not a major system update. | official | Riot Games |
| 26.11 | champion-balance | Multiple champion modifiers normalizedGwen, Vayne, Xayah, Kalista, Fizz, Tristana, Twitch, Smolder, Varus, Samira, Fiddlesticks, and related champions have Mayhem-specific damage, durability, attack-speed, or tenacity modifiers normalized. | official | Riot Games |
| 26.11 | bugfix | Marksmage and quest fixesFixes excessive Graves damage with Marksmage, Ashe Q not applying Marksmage, and Viego being unable to complete Icathia’s Fall while possessing an enemy. | official | Riot Games |
| 26.11 | bugfix | Augment state and casting fixesFixes Veil of Warding going on cooldown on respawn, Phenomenal Evil not granting 40 AP after first augment, and Smolder Q interactions during E with certain augments. | official | Riot Games |
| 26.12 | system-removal | Traits / augment sets phased outThe dev blog says the previous Traits / augment set system is being phased out in 26.12 to make room for new systems. | official | Riot Games |
| 26.12 | design-rationale | Augments return to a champion-first philosophyRiot says Traits led to homogenized builds, homogenized game experiences, trait effects outshining champions, and weaker-feeling individual augments. | official | Riot Games |
| 26.12 | content | Some Trait effects return as standalone augmentsRiot gives Stackasaurus as an example of a trait effect returning as a standalone augment so the payoff is not locked behind completing a set. | official | Riot Games |
| 26.12 | system | Ability Augments expand champion fantasyThe update introduces Ability Augments that significantly enhance individual abilities, with examples such as Multishot and Chain Reaction. | official | Riot Games |
| 26.12 | system | Quest Augments add build goalsRiot describes Quest Augments as goals with meaningful rewards, using examples like Tooth Fairy and Support Main. | official | Riot Games |
| 26.12 | balance-philosophy | Balance aims for fun, not automatic top-end nerfsThe dev blog frames balance as serving freshness and fun: each champion should have strong builds to chase, not always hit them, and Riot wants to avoid only nerfing the strongest numbers. | official | Riot Games |
| 26.12 | roadmap | 2026 updates in progress, 2027 planning startedRiot says the team is working on planned Mayhem updates for 2026 and has started planning for 2027. | official | Riot Games |
| 26.12 | system-removal | Patch 26.12 removes the Trait systemThe TL;DW previews that Patch 26.12 removes the Trait system while preserving popular Traits as new augments. | official | Riot Games |
| 26.12 | system | Ability Augments previewedRiot previews Ability Augments, with examples such as letting Blitzcrank hook multiple people. | official | Riot Games |
| 26.12 | monetization-context | ARAM Wardrobe regional testThe TL;DW says ARAM Wardrobe is being tested in Brazil and Oceania for skin access in ARAM and ARAM: Mayhem. | official | Riot Games |
| 26.12 | system | Ability Augments addedAbility Augments directly upgrade champion abilities and should only be offered when usable by that champion. | official | Riot Games |
| 26.12 | system | Quest Augments expandedQuest Augments expand from one unlock threshold to multi-tier evolutions with clearer tracking and presentation. | official | Riot Games |
| 26.12 | system | Trait system removedPatch 26.12 removes the season trait system and converts some popular trait bonuses into standalone augments. | official | Riot Games |
| 26.12 | pool | Older augment rotationRiot lists older augments removed from the pool to refocus selections around champion abilities and exciting picks. | official | Riot Games |
| 26.12 | content | New silver, gold, and prismatic augmentsRiot lists new silver, gold, and prismatic augments including Archmage, Combusting Interest, Quickstep, Rite of Ascension, and Spirit Bomb. | official | Riot Games |
| 26.12 | test-cycle | Set 2 PBE test entry pointThe LeaguePBE thread is the feedback hub for ARAM: Mayhem Set 2 and links the official dev blog. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.12 | system | Ability AugmentsSet 2 tests Ability Augments that upgrade individual abilities, including extra skillshots, resets, and similar effects. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.12 | system | Quest AugmentsSet 2 tests Quest Augments that become stronger after completing goals, with some quests repeatable for more rewards. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.12 | progression | Mayhem Objectives and new progression trackThe thread mentions a new Mayhem objective subcategory with daily, weekly, and seasonal objectives plus a new progression track. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.12 | system-removal | Augment sets removed, some effects return as augmentsThe PBE post says augment sets are gone and some of their effects are replaced with new standalone augments. | pbe-feedback | Riot QA / LeaguePBE community |
| 26.13 | system | Ability Augment offer fixesRecent hotfixes improve Ability Augment offers so they appear on spells that champions can actually benefit from. | official | Riot Games |
| 26.13 | system | Critical augment offer fixesRiot fixes offer-rate issues for critical-strike augments like Jeweled Gauntlet and It's Critical, plus low Ability Augment odds in the third and fourth slots. | official | Riot Games |
| 26.13 | augment-balance | Augment tuningArchmage moves to Prismatic and Quickstep to Gold; Glass Cannon and Pin Cushion are buffed, while Pressure Cooker, Tooth Fairy, Spirit Bomb, and others are tuned down or adjusted. | official | Riot Games |
| 26.13 | bugfix | Three Mayhem bugfixesRiot fixes The Biggest Snowball Ever double damage, missing-health damage calculation, and infinite shields from two Pat on the Back users. | official | Riot Games |