Color Identity: B

Initial Card State
- All permanents on the battlefield.
Steps
- Activate Umbral Collar Zealot by sacrificing Cauldron Familiar.
- When Cauldron Familar dies, Pitiless Plunderer triggers, creating a Food, a Clue, and a Treasure token.
- Resolve the Umbral Collar Zealot ability.
- Activate Cauldron Familiar by sacrificing a Food, returning Cauldron Familiar from your graveyard to the battlefield.
- When Cauldron Familiar enters the battlefield, it triggers, causing each opponent to lose 1 life and you to gain 1 life.
- Repeat.
Results
- Infinite LTB.
- Infinite ETB.
- Infinite colored mana.
- Infinite sacrifice triggers.
- Infinite death triggers.
- Infinite lifegain triggers.
- Infinite lifegain.
- Infinite lifeloss.
- Infinite Treasure tokens.
- Infinite surveil.
- Infinite +1/+1 counters on a creature.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).