Sauropod Convoy

When Sauropod Convoy enters the battlefield search your library for a Dinosaur creature card and put it in your hand, then shuffle your library.
Anytime a Dinosaur creature enters the battlefield under your control put a +1/+1 counter on Sauropod Convoy.
{t}{x}, remove X +1/+1 counters from Sauropod Convoy, all other Dinosaur creatures you control gain +X/+X and Trample until end of turn.