Perturabo, Daemon Prince

First Strike, Trample, Hexproof, Flying
When Perturabo, Daemon Prince enters the battlefield, you may pay 3 life, if you dont, it
enters the battlefield tapped.
{x}{3}, {t} : Search your library for a card with converted mana cost {x}, put it into your hand,
then shuffle your library.
{u}{b}{r} : Counter target spell with converted
mana cost {5} or less.