Color Identity: U

Initial Card State
- All permanents on the battlefield.
Steps
- Activate Ashnod's Altar by sacrificing Thopter Mechanic, adding ({C} magic symbol)
({C} magic symbol)
. - Thopter Mechanic dies, triggering itself and Nim Deathmantle.
- Resolve the Thopter Mechanic trigger, creating a 1/1 Thopter artifact creature token.
- Activate Ashnod's Altar by sacrificing the Thopter, adding ({C} magic symbol)
({C} magic symbol)
. - Resolve the Nim Deathmantle trigger from step 2, causing you to pay ({4} magic symbol)
to return Thopter Mechanic 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+).