The Ur-Dragon

The Ur-Dragon

Legendary Creature - Dragon Avatar | Power/Toughness: 10 / 10 (CMC 9)
Eminence -- As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost less to cast.
Flying
Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.