Karkinos, Evergrowing Claw

Whenever a creature you control evolves, you
may put a +1/+1 counter on each other creature
you control with evolve.
When Karkinos evolves, create X 0/2 green and
blue Crab creature tokens, where X is the
number of times Karkinos has evolved this game.
Leviathan, crab, octopus, and kraken creatures
you control have evolve.