Squirtle

Creature cards with Channel cost {1} less to cast.
Channel - {u}, Tap target creature. If it's your turn, draw a card.
Withdraw - When Squirtle blocks you may scry 2
and draw a card.
Evolve {4}{u}{t} Sacrifice Squirtle. Search your
hand and library for a card named "Wartortle"
and place it on the battlefield tapped.