Acid-Spewer Dragon (DTK 86)

Creature — Dragon • Mana cost: {5}{B} • Dragons of Tarkir • Uncommon

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 this creature is turned face up, put a +1/+1 counter on each other Dragon creature you control.

Illustrated by James Zapata.