Kiora Queen of Theros

+4: Gain control of target permanent an opponent controls. Untap it. Then create an 8/8 blue Kraken creature token with hexproof.
-4: Tap all nonland permanents target opponent controls. They don't untap during their controller's next untap step.
-12: Search your library for any number of Krakens, Leviathans, Legendary Creatures and/or Enchasntments. Put those permanents into play then shuffle.