Andricar the Merciless

Decline X. Where X is equal to the number of -1/-1 counters on Andricar the Merciless. (At the beginning of your upkeep put a number of -1/-1 counters on Andricar the Merciless equal to the number of -1/-1 counters on him)
Decay (Andricar the Merciless deals and receives damage in the form of -1/-1 counters.)