Patch 26.12

Source Snapshot

Raw catalog rows come from the client source file; canonical rows are the site's deduplicated display catalog; offer-pool counts stay unknown until source evidence proves live availability.

No proven client source for the actual ARAM: Mayhem offer pool has been identified. Do not infer availability from cherry-augments.json, ARAM_ prefixes, or Kiwi UI layout files.

Source Events

• 2026-05-27official-devSource Type: officialOfficial dev blog previews the 26.12 Mayhem revamp

  Riot says 26.12 removes Traits, adds Ability and Quest Augments, and refocuses augments on champion fantasy.

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  • system-removalTraits / augment sets phased out

    The dev blog says the previous Traits / augment set system is being phased out in 26.12 to make room for new systems.

  • design-rationaleAugments return to a champion-first philosophy

    Riot says Traits led to homogenized builds, homogenized game experiences, trait effects outshining champions, and weaker-feeling individual augments.

  • contentSome Trait effects return as standalone augments

    Riot gives Stackasaurus as an example of a trait effect returning as a standalone augment so the payoff is not locked behind completing a set.

  • systemAbility Augments expand champion fantasy

    The update introduces Ability Augments that significantly enhance individual abilities, with examples such as Multishot and Chain Reaction.

  • systemQuest Augments add build goals

    Riot describes Quest Augments as goals with meaningful rewards, using examples like Tooth Fairy and Support Main.

  • balance-philosophyBalance aims for fun, not automatic top-end nerfs

    The 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.

  Riot Games / URL Status: 200

  Source Evidence
• 2026-05-27official-devSource Type: officialTL;DW: 26.12 revamp and 2026/2027 future planning

  The official TL;DW says Riot is working on 2026 Mayhem updates and beginning 2027 planning, while 26.12 removes Traits, preserves popular effects, and adds Ability Augments.

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  • roadmap2026 updates in progress, 2027 planning started

    Riot says the team is working on planned Mayhem updates for 2026 and has started planning for 2027.

  • system-removalPatch 26.12 removes the Trait system

    The TL;DW previews that Patch 26.12 removes the Trait system while preserving popular Traits as new augments.

  • systemAbility Augments previewed

    Riot previews Ability Augments, with examples such as letting Blitzcrank hook multiple people.

  • monetization-contextARAM Wardrobe regional test

    The TL;DW says ARAM Wardrobe is being tested in Brazil and Oceania for skin access in ARAM and ARAM: Mayhem.

  Riot Games / URL Status: 200

  Source Evidence
• 2026-06-09official-patchSource Type: official26.12: Ability and Quest Augments live; Traits removed

  Official patch notes confirm Ability Augments, Quest Augments, and the removal of Augment Traits.

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  • systemAbility Augments added

    Ability Augments directly upgrade champion abilities and should only be offered when usable by that champion.

  • systemQuest Augments expanded

    Quest Augments expand from one unlock threshold to multi-tier evolutions with clearer tracking and presentation.

  • systemTrait system removed

    Patch 26.12 removes the season trait system and converts some popular trait bonuses into standalone augments.

  • poolOlder augment rotation

    Riot lists older augments removed from the pool to refocus selections around champion abilities and exciting picks.

  • contentNew silver, gold, and prismatic augments

    Riot lists new silver, gold, and prismatic augments including Archmage, Combusting Interest, Quickstep, Rite of Ascension, and Spirit Bomb.

  Riot Games / URL Status: 200

  Source Evidence
• PBE cycle before 26.12pbe-feedbackSource Type: pbe-feedbackPBE: ARAM: Mayhem Set 2 bugs and feedback thread

  The LeaguePBE Set 2 thread describes the 26.12 test focus: Ability Augments, Quest Augments, and many new augments.

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  • test-cycleSet 2 PBE test entry point

    The LeaguePBE thread is the feedback hub for ARAM: Mayhem Set 2 and links the official dev blog.

  • systemAbility Augments

    Set 2 tests Ability Augments that upgrade individual abilities, including extra skillshots, resets, and similar effects.

  • systemQuest Augments

    Set 2 tests Quest Augments that become stronger after completing goals, with some quests repeatable for more rewards.

  • progressionMayhem Objectives and new progression track

    The thread mentions a new Mayhem objective subcategory with daily, weekly, and seasonal objectives plus a new progression track.

  • system-removalAugment sets removed, some effects return as augments

    The PBE post says augment sets are gone and some of their effects are replaced with new standalone augments.

  Riot QA / LeaguePBE community / URL Status: -

  Source Evidence

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