Navarog, Honorary Demon

Flying, Menace, Vigilance, Haste
Whenever Navarog is blocked, create either a 4/4 dragon token with Flying, or a 2/2 Demon token
with Menace.
Demonform{4}{r}{b}: Navarog becomes a 6/6
Demon Avatar named Navarog, Demon Prince
with Flying, Menace, Vigilance and: Sacrifice a creature: Destroy target permanent.