The damage type that Amumu deals is mostly Magic Damage.
Amumu's damage type breakdowns as follows:
Amumu's basic attacks Curse enemies for 3 seconds, causing them to take 10% pre-mitigation magic bonus damage as true damage from any magic damage dealt to them.
Launches a bandage in a direction. If it hits an enemy unit, Amumu pulls himself to them, dealing 70/95/120/145/170 (+85% bonus Ability Power) magic damage and stunning for 1 second.This Ability has 2 charges and recharges every 16/15.5/15/14.5/14 seconds.
Toggle: Amumu cries, refreshing Curses on nearby enemies and dealing magic damage equal to 7 plus 1/1.25/1.5/1.75/2% (+5% per 100 ability power) of their maximum health each second.
Passive: Amumu takes 5/7/9/11/13 (+3% bonus armor) (+3% bonus magic resistance) reduced damage from physical attacks (capped at 50% of the damage instance).Active: Amumu tantrums, dealing 65/100/135/170/205 (+50% bonus Ability Power) magic damage to surrounding units.Basic attacks that hit Amumu reduce the cooldown of Tantrum by 0.5 seconds.
Amumu entangles nearby enemy units, dealing 200/300/400 (+80% bonus Ability Power) magic damage and applying Curse. Entangled enemies are stunned for 1.5 seconds.
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