Promising Prestidigitator

This creature is a hero.
Level Up {u}(Put a level counter on this.
Level up only as a sorcery)
Level 0-2: 0/1
Level 3: 1/1 Shroud
Level 4-6: 2/2 Shroud
Level 7: Transform this card into Zaraph Zazacarin, Mind's Gleam