Yangchuanosaurus

Ferocious -Whenever Yangchuanosaurus attacks, if you control a creature with power 4 or greater, Yangchuanosaurus gets +1/+1 until end
of turn.
Yangchuanosaurus was a large, powerful meat-eater. It walked on two large, muscular legs, had short arms, strong, short neck, a big head with powerful jaws, and large, serrated teeth. It had a long, massive tail that was about half of its length. Its feet had three toes, each with a large claw. Its arms were short.