One with the Kami + Cathars' Crusade + Altar of Dementia
One with the Kami
Cathars' Crusade
Altar of Dementia
Infinite creature tokensInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite millInfinite creature sacrifice triggersInfinite self-millInfinite +1/+1 counters on creatures you control
How it works
Activate Altar of Dementia by sacrificing any other modified creature you control with power one or greater.
One with the Kami triggers, creating a number of 1/1 Spirit creature tokens equal to the sacrificed creature's power.
The Spirit tokens enter the battlefield, triggering Cathars' Crusade that many times, putting that many +1/+1 counters on each creature you control.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power.