Arian, Cybernetic Thief

: Creatures in your hand and in exile have ninjitsu equal to their mana cost. You may cast cards exiled with Arian, Cybernetic Thief.
+2: Exile the top 2 cards of target opponents library.
-12: Exile cards from the top of each opponents library until the exiled cards have total mana value 10 or more.