Color Identity: B

Initial Card State
- All permanents on the battlefield.
Notable Prerequisites
- Serrated Biskelion does not have summoning sickness.
- Thornbite Staff attached to Serrated Biskelion.
- Butcher Ghoul does not have more than one +1/+1 counter on it.
Steps
- Activate Serrated Biskelion by tapping it, putting a -1/-1 counter on it and Butcher Ghoul.
- Activate Ashnod's Altar by sacrificing Butcher Ghoul, adding ({C} magic symbol)
({C} magic symbol)
. - When Butcher Ghoul dies, its undying ability and Serrated Biskelion trigger.
- Resolve the Serrated Biskelion trigger, untapping it.
- Resolve the Butcher Ghoul trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
- When Butcher Ghoul leaves your graveyard, Thran Vigil triggers, putting a +1/+1 counter on Serrated Biskelion.
- Repeat.
Results
- Infinite colorless mana.
- Infinite death triggers.
- Infinite ETB.
- Infinite lifeloss.
- Infinite LTB.
- Infinite sacrifice triggers.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).