Apostolus Mortis

Whenever Apostolus Mortis Attacks, each opponent faces a choice: Join the Cult or refuse.

If a player refuses, you create a 5/5 black Demon creature token with flying, and they lose 5 life.
If a player joins the cult, you create two 0/1 black Cleric creature tokens, and draw a card.

At the beginning of your upkeep if you control 13 Cleric creatures, you win the game.