Awaken the Curse

As Awaken the Curse enters the battlefield, you may search your library and/or graveyard for a card named Kraal, the Plague-Ridden, reveal it, and put it into your hand. If you search your library this way, shuffle it.
Creatures you control with infect get +1/+1.
Whenever a planeswalker you control leaves the battlefield, you may pay {p/c}{p/c}. If you do, return that card to your hand.