The Omega Dragon

Flying, Trample, Hexproof
Dragon Command ( Whenever a dragon enters the battlefield, put a +1/ +1 on all dragons )
Eminence {1}
Whenever Hyperion, the Great Behemoth enters
the battlefield, place all dragons in your hand
onto the battlefield.
Whenever a dragon attacks find that many
dragons in your library, then shuffle.
Even the Ur-Dragon fears something.