Frank Zhang

Metamorph {4} (You may cast this card for its metamorf cost face down as a 4/4 blue Shark.
Pay {u}{u} to flip it over.)
{x}{u/r}: Frank Zhang becomes a X/X green
Bear with trample until end of turn.
If you control a Mars Planeswalker, this creature gets +3/+3 and reach.
A shapeshifter and an archer.