Hour of Devastation

Tap any number of creatures you control to have this deal that much damage to target creature or player. You may then exert all those creatures to search your library for a Bolas planeswalker and put it into your hand. Shuffle your library.
If another Hourglyph was cast this turn, you may cast this counting the creatures that Hourglyph used.
The forbidden devotion too holy to be made.