Dragons of Tarkir

Descent of the Dragons | Sorcery | | Destroy any number of target creatures. For each creature destroyed this way, its controller creates a 4/4 red Dragon creature token with flying. | Steve Prescott

Stormcrag Elemental | Creature | Elemental | Trample Megamorph {4}{R}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.) | Ralph Horsley

Stormwing Dragon | Creature | Dragon | Flying, first strike Megamorph {5}{R}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.) When Stormwing Dragon is turned face up, put a +1/+1 counter on each other Dragon creature you control. | Svetlin Velinov

Dragonlord Kolaghan | Legendary Creature | Elder Dragon | Flying, haste Other creatures you control have haste. Whenever an opponent casts a creature or planeswalker spell with the same name as a card in their graveyard, that player loses 10 life. | Jaime Jones

Swift Warkite | Creature | Dragon | Flying When Swift Warkite enters the battlefield, you may put a creature card with mana value 3 or less from your hand or graveyard onto the battlefield. That creature gains haste. Return it to your hand at the beginning of the next end step. | Izzy

Savage Ventmaw | Creature | Dragon | Flying Whenever Savage Ventmaw attacks, add {R}{R}{R}{G}{G}{G}. Until end of turn, you don't lose this mana as steps and phases end. | Slawomir Maniak