Gerrard, Weatherlight Hero + Cauldron of Souls + Extruder + Shilgengar, Sire of Famine

Gerrard, Weatherlight Hero

Cauldron of Souls

Extruder

Shilgengar, Sire of Famine

How it works

1. Activate Cauldron of Souls by tapping it, giving Gerrard persist until end of turn.
2. Activate Extruder by sacrificing Cauldron of Souls, putting a +1/+1 counter on Gerrard.
3. Activate Shilgengar by sacrificing Gerrard.
4. When Gerrard dies, it and its persist ability trigger.
5. Resolve the Gerrard persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
6. Resolve the second Gerrard trigger, failing to exile it as it has left your graveyard, and returning Cauldron of Souls from your graveyard to the battlefield.
7. Resolve the Shilgengar ability from step 3
8. Repeat.

This ingenious loop transforms a battlefield into an endless cycle of sacrifice and rebirth, masterminded by Gerrard, Weatherlight Hero and Shilgengar, Sire of Famine. By using Extruder to sacrifice Cauldron of Souls, you feed Gerrard a +1/+1 counter so he can survive the persist trigger granted to him by the Cauldron, allowing both Gerrard and the Cauldron to return to the battlefield together. Meanwhile, Shilgengar keeps the machinery churning by converting your sacrifices into Blood tokens, which can later be cashed in when needed.