Octowizard

Whenever you cast a noncreature spell with mana value 3, create a 3/3 blue Octopus creature token.

Whenever you cast a noncreature spell with mana value 4, create a 4/4 blue Serpent creature token.

Whenever you cast a noncreature spell with mana value 5, create a 6/6 blue Kraken creature token.

Whenever you cast a noncreature spell with mana value 6 or greater, create a 10/10 blue Leviathan creature token.