40K-126 The Horus Heresy

(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 this Saga remains on the battlefield.
II - Draw a card for each creature you control but don't own.
III - Starting with you, each player chooses a creature. Destroy each creature chosen this way.