Deathbringer Regent | Creature | Dragon | Flying
When Deathbringer Regent enters the battlefield, if you cast it from your hand and there are five or more other creatures on the battlefield, destroy all other creatures. | Adam Paquette
Foe-Razer Regent | Creature | Dragon | Flying
When Foe-Razer Regent enters the battlefield, you may have it fight target creature you don't control.
Whenever a creature you control fights, put two +1/+1 counters on it at the beginning of the next end step. | Lucas Graciano
Arashin Sovereign | Creature | Dragon | Flying
When Arashin Sovereign dies, you may put it on the top or bottom of its owner's library. | Dan Scott
Dragonlord Atarka | Legendary Creature | Elder Dragon | Flying, trample
When Dragonlord Atarka enters the battlefield, it deals 5 damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control. | Karl Kopinski