Color Identity: B

Initial Card State
- All permanents on the battlefield.
Notable Prerequisites
- Sword of Paruns attached to Marrow-Gnawer.
- Marrow-Gnawer does not have summoning sickness.
- You control at least three additional Rats.
Steps
- Activate Marrow-Gnawer by tapping it and sacrificing another Rat, creating at least three 1/1 Rat creature tokens.
- Activate Ashnod's Altar twice by sacrificing two Rat tokens, adding ({C} magic symbol)
({C} magic symbol)
({C} magic symbol)
({C} magic symbol)
. - Activate Sword of Paruns by paying ({3} magic symbol)
, untapping Marrow-Gnawer. - Repeat.
Results
- Infinite colorless mana.
- Infinite creature tokens.
- Infinite death triggers.
- Infinite ETB.
- Infinite LTB.
- Infinite sacrifice triggers.
- Infinite untap of creatures you control.
- Infinite mana creatures you control can produce.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).