Infinite death triggersInfinite creature ETBInfinite creature LTBInfinite creature sacrifice triggers
How it works
Activate Ashnod's Altar by sacrificing Armada Wurm, adding CC.
Armada Wurm dies, triggering Nim Deathmantle, causing you to pay 4 to return Armada Wurm from your graveyard to the battlefield, and attach Nim Deathmantle to it.
Armada Wurm enters the battlefield, creating a 5/5 Wurm creature token.
Activate Ashnod's Altar by sacrificing the Wurm, adding CC.