Sarkhan, Soul Aflame is a mythic Legendary Creature — Human Shaman card from Tarkir: Dragonstorm Commander (TDC), collector number 301. Current market price: $0.80, TCGplayer market prices via Scryfall.
Dragon spells you cast cost {1} less to cast. Whenever a Dragon you control enters, you may have Sarkhan become a copy of it until end of turn, except its name is Sarkhan, Soul Aflame and it's legendary in addition to its other types.