(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I — For each opponent, gain control of up to one target nonlegendary creature that player controls for as long as The Horus Heresy remains on the battlefield.

II — Draw a card for each creature you control but don't own.

III — Starting with you, each player choses a creature. Destroy each creature chosen this way.