Cirrus, Cloudcloak Thief

Whenever this creature deals damage to a player
or planeswalker, exile the top cards of both their
library and yours. Until end of turn, you may
play these cards, and you may spend mana as
though it were mana of any color to do so.
Whenever you cast a spell from exile, put a
+1/+1 counter on this creature.
"They say the only way to trap the sun is to convince
it that you're the sky."