Color Identity: B

Initial Card State
- All permanents on the battlefield.
Steps
- Activate Ashnod's Altar by sacrificing Nested Shambler, adding ({C} magic symbol)
({C} magic symbol)
. - When Nested Shambler dies, it and Nim Deathmantle trigger,.
- Resolve the Nested Shambler trigger, creating at least three creature tokens.
- Holding priority, activate Ashnod's Altar by sacrificing a creature token, adding ({C} magic symbol)
({C} magic symbol)
. - Resolve the Nim Deathmantle trigger, causing you to pay ({4} magic symbol)
to return Nested Shambler from your graveyard to the battlefield and attach Nim Deathmantle to it. - Repeat.
Results
- Infinite LTB.
- Infinite ETB.
- Infinite sacrifice triggers.
- Infinite death triggers.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).