Teenage Mutant Ninja Turtles - S04

When the Teenage Mutant Ninja Turtles get Mutastones from Crys-Mu, the spirit of light, they gain the ability to power up into Super Turtles for three minutes. Meanwhile, the evil Shredder and his minions Bebop and Rocksteady come across the Dark Mutastone, which turns them into Devil Shredder, Supermutant Bebop and Supermutant Rocksteady. But the Turtles have one more trick up their shells: all four of them can combine into their ultimate form, Turtle Saint.