Druid's Call + Cathars' Crusade + Triskelion + Vorinclex, Monstrous Raider

Druid's Call

Cathars' Crusade

Triskelion

Vorinclex, Monstrous Raider

How it works

1. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to itself.
2. Druid's Call triggers, creating a 1/1 Squirrel creature token.
3. When the Squirrel enters the battlefield, Cathars' Crusade triggers, putting two +1/+1 counters on each creature you control.
4. Repeat.
5. During the next player's turn, you may remove all of the +1/+1 counters from Triskelion to deal infinite damage to any target(s).

This ingenious loop turns Triskelion upon itself, using its ability to deal 1 damage to its own body while wearing Druid's Call to spawn a 1/1 green Squirrel creature token. That token's arrival triggers Cathars' Crusade, but the real amplifier here is Vorinclex, Monstrous Raider, whose static doubling effect turns those incoming buffs into an overwhelming cascade of +1/+1 counters on your entire team. Because those counters replenish Triskelion faster than it can spend them, you rapidly accumulate infinite creature tokens, infinite creature ETBs, and infinite +1/+1 counters to unleash total annihilation upon any target.