Ilmu, Nomad of Shallows

Ilmu, Nomad of Shallows costs {w}, {u}, {b} and {g} less to cast for each of those mana symbols
among Crabs and Frogs you control.
Crabs you control get +1/+1
Whenever you cast a Crab Scry 2.
Pay 3 life: Transform Ilmu, Nomad of Shallows.