PassiveVoid StoneKassadin takes reduced <magicDamage>magic damage</magicDamage> and transforms incoming magic damage into bonus <attackSpeed>Attack Speed</attackSpeed>.

Classic champion edition
The Void Walker · Assassin / Mage
Review the Classic kit and client description. Classic data stays separate from the modern edition.
PassiveVoid StoneKassadin takes reduced <magicDamage>magic damage</magicDamage> and transforms incoming magic damage into bonus <attackSpeed>Attack Speed</attackSpeed>.
QNull SphereKassadin fires an ethereal bolt of void energy, dealing damage and silencing the target for a duration.
WNether BladePassive: Kassadin's basic attacks restore Mana. Active: Kassadin's basic attacks deal additional magic damage.
EForce PulseKassadin draws energy from spells cast in his vicinity. Upon charging up, Kassadin can use Force Pulse to damage and slow enemies in a cone in front of him.
RRiftwalkKassadin teleports to a nearby location dealing damage to nearby enemy units. Additionally, multiple Riftwalks in a short period of time cause them to cost additional Mana and deal additional damage.