Shai'Hulud, Father of Worms

Indestructible, Trample

Annihilator 8 (Whenever this creature attacks, the player attacked sacrifices 8 permanents.)
{t},{w}{w}{u}{u}{5}, create 4 6/6 white and blue worm creature tokens with indestructible and trample.
{x}{w}{w}{u}{u}, deal X damage to all creatures on the field except for Shai'Hulud.
If Shai'Hulud dies, activate both of its abilities for no mana cost.