Garruk the Slayer (Prerelease Challenge) [Magic 2015 Prerelease Promos]

0: Put a 2/2 green Wolf creature token onto the battlefield.
+4: Target Wolf creature gets +1/+0 and gains deathtouch until end of turn.
−10: Destroy target creature. Put loyalty counters on Garruk the Slayer equal to that creature's toughness.
−25: Destroy all creatures Garruk the Slayer doesn't control.