Amumu, the Sad Mummy

Whenever Amumu, the Sad Mummy deals
damage put a Cursed counter on the target that
took damage. (Whenever you deal damage to a
target, amplify the damage by X, X being the number
of Cursed counters on the target.)
Whenever a target that has Cursed counters
dies, put X +1/+1 counters on Amumu, the Sad
Mummy based off of the number of Cursed
counters.
"Solitude can be lonelier than death."—Amumu