Aatrex - Blood Rebirther

Eminence - Whenever one or more Dragons you control cause you to gain at least 10 life, you may return target Dragon permanent card from your graveyard to the battlefield: Or, put a commander
you own from the command zone onto the battlefield. It gains haste.
Flying, Dragons you control have lifelink
Pay 10 life or send a legendary Dragon creature
that you control to the graveyard: Destroy target
creature.