If no mana was spent to cast Glorifax, The Glutton counter it.

If you cast Glorifax, the Glutton from anywhere other than your hand, exile it instead.

When Glorifax, The Glutton enters the battlefield, exile the top half of target players library.

Glorifax, the Glutton's power is equal to the combined power of all creatures exiled with Glorifax, The Glutton.

Once per turn, you may cast an instant or sorcery exiled with Glorifax, The Glutton. Only as a sorcery