The Rhystic Dragon

Eminence — As long as The Rhystic Dragon is in
the command zone or on the battlefield, other legendary spells you cast cost {1} 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.
{7}, {t}: Put a card from your graveyard unto the battlefield under your control unless another player pays {1}