Seraphon Onslaught

Seraphon you control have when this creature enters the battlefield, if this creature is a Skink, draw a card and gain 3 life. If it is a Saurus, put a +1/+1 counter on each creature you control. If it is a Kroxigor, make a Moonhammer token. If it is a Slann, put the top three cards of your library onto your battlefield. If it is a Dinosaur, add {g}{g}.