Australia

Australia enters the battlefield tapped
When Australia enters the battlefield, sacrifice an artifact, a creature, and a land
{t}: {b}{g}
{t}, {2}{b}{b}{g}{g}: choose one
-Create a 3/2 giant bat creature token with flying
and a 2/4 giant spider creature token with reach
-Until end of turn, Australia becomes a 5/6 legendary creature called Horror of Australia with infect. It is still a land.