Create Rocksteady's origin and mutate him into a ferocious, hulking rhino! The origin of Turtles' roughest, toughest (and most incompetent) villain is revealed when you create this horrific mutation! Build the brutish thug, then mutate him from man to rhino when you swap out classic accessories including rhino arms and head! Connect Rocksteady to the buildable pipes backdrop with '87 animated series-themed high res panels to create the most radical Turtles villain display! Ideal for ages 10 and up.