One with the Kami + Cathars' Crusade + Ashnod's Altar
One with the Kami
Cathars' Crusade
Ashnod's Altar
Infinite colorless manaInfinite creature tokensInfinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggersInfinite +1/+1 counters on most creatures you control
How it works
Activate Ashnod's Altar by sacrificing any other modified creature you control with power one or greater, adding CC.
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.