Activate Ashnod's Altar by sacrificing Ancient Stone Idol, adding {C}{C}.
Ancient Stone Idol dies, triggering itself and Nim Deathmantle.
Resolve the Ancient Stone Idol trigger, creating a 6/12 Construct artifact creature token.
Activate Ashnod's Altar by sacrificing the Construct, adding {C}{C}.
Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Ancient Stone Idol from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Repeat.


Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Ancient Stone Idol

Activate Krark-Clan Ironworks by sacrificing Ancient Stone Idol, adding {C}{C}.
Ancient Stone Idol dies, triggering itself and Nim Deathmantle.
Resolve the Ancient Stone Idol trigger, creating a 6/12 Construct artifact creature token.
Activate Krark-Clan Ironworks by sacrificing the Construct, adding {C}{C}.
Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Ancient Stone Idol from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Repeat.


Combos with "Ancient Stone Idol"