Transcendent Master is a mythic Creature — Human Cleric Avatar card from Mystery Booster 2 (MB2), collector number 23. Current market price: $0.36, TCGplayer market prices via Scryfall.
Level up {1} ({1}: Put a level counter on this. Level up only as a sorcery.) LEVEL 6-11 6/6 Lifelink LEVEL 12+ 9/9 Lifelink, indestructible