Cauldron of Souls + Zealous Conscripts + Verdurous Gearhulk + Thermopod

Cauldron of Souls

Zealous Conscripts

Verdurous Gearhulk

Thermopod

How it works

1. Activate Cauldron of Souls by tapping it, giving Verdurous Gearhulk and Zealous Conscripts persist until end of turn.
2. Activate Thermopod's second ability by sacrificing Zealous Conscripts, adding .
3. When Zealous Conscripts dies, its persist ability triggers, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
4. When Zealous Conscripts enters the battlefield, it triggers, untapping Cauldron of Souls.
5. Activate Thermopod's second ability by sacrificing Verdurous Gearhulk, adding .
6. When Verdurous Gearhulk dies, its persist ability triggers, returning itself from your graveyard to the battlefield with a -1/-1 counter on it.
7. When Verdurous Gearhulk enters the battlefield, it triggers, putting a +1/+1 counter on itself and Zealous Conscripts, and two +1/+1 counters on any other creature(s) you control.
8. Repeat.