(Innate): Amumu's attacks reduce the target's magic resistance by 15 / 20 / 25 for 3 seconds. The debuff doesn't stack but it refreshes with every attack.
Cursed Touch is a passive ability that grants Amumu an on-hit effect, causing his autoattacks to reduce the target's magic resistance for 3 seconds, by an amount scaling with Amumu's champion level.
Cursed Touch does not stack but the duration is refreshed with every auto attack.
Cursed Touch cannot be blocked by spell shields or Black Shield.
Amumu's auto attacks will not pop spell shields to apply the debuff.
(Active): Amumu tosses a sticky bandage towards a target location, if it contacts an enemy Amumu pulls himself to it and will deal magic damage and stun the target for 1 second.
Bandage Toss is a collision linear skillshot that will deal magic damage and stun the first enemy unit it hits, while Amumu is pulled to the target's location.
Bandage Toss will damage Black Shield and the stun will be negated but Amumu will still be pulled to his target.
Bandage Toss deals damage upon encountering a target, not upon completion of the pull.
Amumu will attempt to attack the target he hits with Bandage Toss after pulling himself to it.
Bandage Toss can be used to pull Amumu through walls.
Bandage Toss has a brief channel time (0.2s) upon cast before it activates.
Bandage Toss' stun will interrupt channeled abilities.
Bandage Toss can hit and stun invisible enemy champions, but it won't reveal them.
Bandage Toss cannot be cast when Amumu is rooted
If Bandage Toss is cast and the Amumu is rooted, Amumu will be pulled towards the target but will be rooted afterwards for the remaining duration
While in the process of being pulled towards a target, Amumu becomes immune to contact-based skill-shots such as Morgana's Dark Binding
Amumu can be hit by targeted abilities that have been activated before he begins being pulled to the target but hit after the pull has begun (I.e. If Amumu Bandages Vayne when Vayne Condemns Amumu, Amumu's bandage will hit Vayne, Amumu will be knocked back, then pulled towards Vayne; similar to the Blitz-Nautilus effect)
Once channeled, Bandage Toss will proc, even if Amumu dies immediate afterwards (I.e., if Amumu casts Bandage Toss and immediately dies afterwards, Bandage Toss can still fly out and stun an enemy, possibly killing them.) Amumu's corpse stays where it fell
Despair
(Toggle): Overcome by anguish, nearby enemies will be dealt a percentage of their maximum health plus a base amount as magic damage each second.
Cost: 8 mana per second
Cooldown: 1 second
Diameter of AoE: 600
Base Magic Damage: 8 / 12 / 16 / 20 / 24.
Health Drain: 1.5 / 1.8 / 2.1 / 2.4 / 2.7 (+0.01 per ability power)%
Despair is a toggled point blank area of effect ability. While toggled on, Amumu deals magic damage every half second to all enemy units around himself, scaling on an affected target's maximum health.
(Passive): Amumu takes reduced damage from physical attacks. Each time Amumu is hit by an attack, the cooldown on Tantrum's active is reduced by half a second.
Damage Reduction: 2 / 4 / 6 / 8 / 10
(Active): Amumu deals magic damage to surrounding units.
Tantrum passively reduces the amount of physical damage Amumu takes. When activated, Tantrum is a point blank area of effect ability that deals magic damage to all enemy units around Amumu. Taking damage will reduce the cooldown.
Curse of the Sad Mummy is a point blank area of effect ability that deals magic damage and prevent all enemy units in a wide radius from moving or attacking for 2 seconds.
Curse of the Sad Mummy does not proc on-hit effects.
Curse of the Sad Mummy procs spell vamp and Rylai's slow similarly with all area of effect spells and abilities with diminished effect.