|"Promise of Aclazotz", |"Promesse d'Aclazotz", |"Lost Caverns of Ixalan Commander" (2)
Sacrifice a non-Demon creature. If you do, create a 4/3 white and black Vampire Demon creature token with flying.
At the beginning of your end step, you may sacrifice a non-Demon creature. If you do, populate. (Create a token that's a copy of a creature token you control.)
Gatherer works better in the Companion app!