Kulrath Mystic is a common Creature — Elemental Wizard card from Lorwyn Eclipsed (ECL), collector number 56. Current market price: $0.06 (foil $0.11), TCGplayer market prices via Scryfall.
Whenever you cast a spell with mana value 4 or greater, this creature gets +2/+0 and gains vigilance until end of turn.