Umbral Collar Zealot + Cult Conscript + Pitiless Plunderer + Fumulus, the Infestation

Umbral Collar Zealot

Cult Conscript

Pitiless Plunderer

Fumulus, the Infestation

How it works

1. Activate Umbral Collar Zealot by sacrificing Cult Conscript.
2. When Cult Conscript dies, Pitiless Plunderer and Fumulus trigger, creating a creature token and a Treasure token.
3. Resolve the Umbral Collar Zealot ability.
4. Activate Umbral Collar Zealot by sacrificing the creature token.
5. When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token.
6. Resolve the Umbral Collar Zealot ability.
7. Activate the Treasures by tapping and sacrificing them, adding 1.
8. Activate Cult Conscript by paying 1, returning it from your graveyard to the battlefield.
9. Repeat.