Krabby

Defender
Channel - {2}{u}, Discard Krabby. Counter target creature spell unless it's owner pays {3}.
Bubblebeam {u}{t} Sacrifice Krabby. Counter
target creature spell unless they pay {1}.
Evolve {3}{u}{u}{u}{t} Sacrifice Krabby. Search your
hand and library for a card named "Kingler" and
place it onto the battlefield tapped.