Sarkhan, the Dragonspeaker is a mythic Legendary Planeswalker — Sarkhan card from Khans of Tarkir (KTK), collector number 119. Current market price: $0.60 (foil $3.06), TCGplayer market prices via Scryfall.
+1: Until end of turn, Sarkhan becomes a legendary 4/4 red Dragon creature with flying, indestructible, and haste. (He doesn't lose loyalty while he's not a planeswalker.) −3: Sarkhan deals 4 damage to target creature. −6: You get an emblem with "At the beginning of your draw step, draw two additional cards" and "At the beginning of your end step, discard your hand."