Stampeding Gammoth

Trample
Turf War {4}{r/g}{r/g}{r/g} ( You may cast this creature
for its Turf War cost as though it had flash only if
an opponent attacks you with a creature that shares
a color with this one.)
When Stampeding Gammoth enters the battlefield, create a 3/3 green wyvern creature
token. If its Turf War cost was paid, create a 7/7
green wyvern creature token instead.