Colfenor, the Last Yew + Gutter Grime + Thermopod

Colfenor, the Last Yew

Gutter Grime

Thermopod

How it works

1. Cast the creature card in your hand by paying 0.
2. Either that creature dies as a state-based action due to having zero toughness, or activate Thermopod by sacrificing that creature, adding .
3. Gutter Grime triggers, putting a slime counter on it and creating a X/X Ooze creature token.
4. Activate Thermopod by sacrificing the Ooze, adding .
5. When the Ooze dies, Colfenor triggers, returning the creature card from your graveyard to your hand.
6. Repeat.

This loop relies on an elegant feedback loop between death triggers and recursive graveyard recursion, fueled entirely by the sacrifice outlet Thermopod. When you sacrifice a creature to Thermopod for red mana, Gutter Grime springs into action by accumulating slime counters and spawning an ever-growing Ooze token. As that Ooze eventually hits the graveyard, Colfenor, the Last Yew uses its toughness-checking trigger to pull your original creature card right back out of the graveyard and into your hand. This cycle effortlessly generates infinite mana, death triggers, storm count, and infinitely large Ooze tokens to overwhelm your opponents in formats like Commander and Legacy.