Garruk the Slayer is a common Legendary Planeswalker — Garruk card from M15 Prerelease Challenge (PPC1), collector number 1. Current market price: $2.57, TCGplayer market prices via Scryfall.
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.