Morningtide

Grimoire Thief

Whenever Grimoire Thief becomes tapped, remove the top three cards of target opponent's library from the game face down.
You may look at cards removed from the game with Grimoire Thief.
{U}, Sacrifice Grimoire Thief: Turn all cards removed from the game with Grimoire Thief face up. Counter all spells with those names.

Whenever Grimoire Thief becomes tapped, exile the top three cards of target opponent's library face down.
You may look at cards exiled with Grimoire Thief.
{U}, Sacrifice Grimoire Thief: Turn all cards exiled with Grimoire Thief face up. Counter all spells with those names.