Garruk, Hunter Supreme

Deathtouch, trample
If an opponent cast a planeswalker spell this turn and you control a Swamp and a Forest, you may cast Garruk, Hunter Supreme without paying its mana cost and as though it had flash.
Whenever Garruk deals combat damage to a planeswalker, destroy that planeswalker.
"You were an easy mark, Jace."