Awaken the Sky Tyrant
Commander 2015 — rare
Enchantment
Awaken the Sky Tyrant rulings:
2015-11-04: If Awaken the Sky Tyrant isn’t on the battlefield as its ability resolves, you can’t sacrifice it. You won’t get the Dragon in that case.
2015-11-04: Awaken the Sky Tyrant will trigger once for each source an opponent controls that deals damage to you, but you can sacrifice it only once.