Lost World

{t}: Add one {r}, {g}, or {w}
All non-Dinosaur creatures get -1/-1.
Once per turn, when you cast a Dinosaur creature, target opponent creates a tapped 0/1 green Dinosaur Egg token.
If an opponent controls a token your nontoken creatures gain Hexproof from sources that player controls.
Once per turn, when one or more creatures you control with a converted mana cost of 4 or less would be destroyed, you may discard a number of Dinosaur creatures equal to the cards being destroyed instead.