Grimfor, Death's Bane

Flying, trample, shroud
Whenever another Dragon enters the battlefield,
if that Dragon is red, green, or blue, put 5 +1/+1
counters on it and it's goaded for the rest of the
game.
{g}{u}{r}: Grimfor gets +3/+3 until end of turn.
The green eye's glow enraptures all.