Color Identity: R

Initial Card State
- All permanents on the battlefield.
Steps
- Activate Ashnod's Altar by sacrificing Harried Spearguard, adding ({C} magic symbol)
({C} magic symbol)
. - When Harried Spearguard dies, it and Nim Deathmantle triggers.
- Resolve the Harried Spearguard trigger, creating a 1/1 Rat creature token.
- Activate Ashnod's Altar by sacrificing the Rat, adding ({C} magic symbol)
({C} magic symbol)
. - Resolve the Nim Deathmantle trigger from step 2, causing you to pay ({4} magic symbol)
to return Harried Spearguard from your graveyard to the battlefield, and attach Nim Deathmantle to it. - Repeat.
Results
- Infinite death triggers.
- Infinite ETB.
- Infinite LTB.
- Infinite sacrifice triggers.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).