1Activate Ashnod's Altar by sacrificing Aether Channeler, adding .
2Aether Channeler dies, triggering Nim Deathmantle, causing you to pay to return Aether Channeler from your graveyard to the battlefield, and attach Nim Deathmantle to it.
3Aether Channeler enters the battlefield, creating a 1/1 Bird creature token.
4Activate Ashnod's Altar by sacrificing the Bird, adding .