Ygra, Eater of All + Camellia, the Seedmiser + Altar of Dementia

Ygra, Eater of All

Camellia, the Seedmiser

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing any other creature.
2. Because the creature is a Food due to Ygra, when it dies, Camellia and Ygra trigger.
3. Resolve the Ygra trigger, putting two +1/+1 counters on it.
4. Resolve the Camellia trigger, creating a 1/1 Squirrel creature token.
5. Resolve the Altar of Dementia ability, dealing damage equal to its power to any target.
6. Repeat.

This gruesome loop turns your entire board into an unstoppable engine of destruction by leveraging Ygra, Eater of All, whose static ability turns every other creature you control into a Food artifact in addition to its other types. With that foundation set, you can sacrifice a creature to Altar of Dementia to mill an opponent based on its power; thanks to Ygra, that sacrificed creature dying as a Food immediately triggers Camellia, the Seedmiser to generate a fresh 1/1 green Squirrel token while also feeding Ygra's own trigger to stack up endless +1/+1 counters. Because that newly minted Squirrel can be sacrificed right back to Altar of Dementia to repeat the entire sequence, you easily achieve an infinite loop of sacrifices, death triggers, and a massive mill that will quickly deck any opponent.