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