
(An ongoing scheme remains face up until it's abandoned.)
At the beginning of your end step, create a 3/3 black Horror creature token.
At the beginning of your opponents' end step, they may sacrifice two creatures of their choice. If they do, abandon this scheme.
My Forces Are Innumerable has 1 printing, first in Archenemy: Nicol Bolas Schemes (2017). It has 2 official rulings.