Acid-Spewer 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
for its megamorph cost and put a +1/+1
counter on it.)
When Acid-Spewer Dragon is turned face up,
put a +1/+1counter on each other dragon
creature you control.