Cauldron Familiar + Witch's Oven + Dross Scorpion + Biotransference

Cauldron Familiar

Witch's Oven

Dross Scorpion

Biotransference

How it works

1. Activate Witch's Oven by tapping it and sacrificing Cauldron Familiar.
2. When Cauldron Familiar dies, Dross Scorpion triggers, untapping Witch's Oven.
3. Resolve the Witch's Oven ability, creating a Food artifact token.
4. Activate Cauldron Familiar by sacrificing a Food token, returning it from your graveyard to the battlefield.
5. When Cauldron Familiar enters the battlefield, it triggers, causing each opponent to lose 1 life and you to gain 1 life.
6. Repeat.

This elegant feedback loop turns a humble cat-and-oven routine into a fully automated engine, supercharged by the presence of Biotransference. While Witch's Oven sacrifices Cauldron Familiar to generate a Food token—which the Familiar then eagerly consumes to leap right back out of the graveyard—Dross Scorpion ensures the Oven never needs a rest by taking advantage of the creature's death to untap it. Biotransference quietly binds the entire assembly together by making all of your creatures into artifacts both on the battlefield and in the graveyard, ensuring that everything flows seamlessly while dealing out life-drain attrition with every cycle.