Harpua

{8}: You may cast a card you own from
outside the game without paying its mana cost.
Use this ability only as a sorcery.
At the beginning of your end step, you may
destroy target Cat named Poster Nutbag.
Swampwalk
Devoted followers have been known to chase the fabled
Harpua and its cries of "Oom-Pa-Pa" for decades
without a single sighting.