Dragons of Tarkir

Acid-Spewer Dragon | Creature | Dragon | Flying, deathtouch Megamorph {5}{B}{B} (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 Acid-Spewer Dragon is turned face up, put a +1/+1 counter on each other Dragon creature you control. | James Zapata

Ambuscade Shaman | Creature | Orc Shaman | Whenever Ambuscade Shaman or another creature enters the battlefield under your control, that creature gets +2/+2 until end of turn. Dash {3}{B} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.) | Anthony Palumbo

Blood-Chin Rager | Creature | Human Warrior | Whenever Blood-Chin Rager attacks, Warrior creatures you control gain menace until end of turn. (They can't be blocked except by two or more creatures.) | Karl Kopinski

Marang River Skeleton | Creature | Skeleton | {B}: Regenerate Marang River Skeleton. Megamorph {3}{B} (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.) | Jack Wang

Minister of Pain | Creature | Human Shaman | Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Minister of Pain exploits a creature, creatures your opponents control get -1/-1 until end of turn. | Izzy

Rakshasa Gravecaller | Creature | Cat Demon | Exploit (When this creature enters the battlefield, you may sacrifice a creature.) When Rakshasa Gravecaller exploits a creature, create two 2/2 black Zombie creature tokens. | Jakub Kasper

Ukud Cobra | Creature | Snake | Deathtouch | Johann Bodin

Ruthless Deathfang | Creature | Dragon | Flying Whenever you sacrifice a creature, target opponent sacrifices a creature. | Filip Burburan

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