1Activate Ashnod's Altar by sacrificing Angel of Invention, adding .
2When Angel of Invention dies, Nim Deathmantle triggers, causing you to pay to return Angel of Invention from your graveyard to the battlefield and attach Nim Deathmantle to it.
3When Angel of Invention enters, it triggers, creating two creature tokens.
4Activate Ashnod's Altar by sacrificing a creature token, adding .