The Coming of Galactus 2BBG

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.) I — Destroy up to one target nonland permanent. II, III — Each opponent loses 2 life. IV — Create Galactus, a legendary 16/16 black Elder Alien creature token with flying, trample, and "Whenever Galactus attacks, destroy target land."