The Grotbog Monster

Defender, Fear, Trample, Vigilance.
{1}, sacrifice an untapped land: If the land
sacrificed to activate this ability is an Island,
target permanent you control becomes a copy of
this card, except that its name is Grotbog
Simulacrum. If the land is a Swamp, this creature
loses Defender until end of turn. If the land is a forest, gain {g}{g}{g}.