Squirtle

Evolve 1: Turtle (If you have the corresponding
Evolve 2 creature, you may play it on top of this
creature for its mana cost subtracted by this creatures
mana cost.)
When Squirtle enters the battlefield, draw a card.
"Squirtle's shell is not merely used for protection. The
shell's rounded shape and the grooves on its surface
help minimize resistance in water, enabling this
Pokemon to swim at high speeds."