Rahzar is martial artist Chris Bradford's second mutation. His first was Dogpound, the spiky Akita-like minion of Shredder. Now, after falling into a tank of Ooze in Baxter Stockman's lab, his body has been transformed from its bulky former self into a lean, agile, and superstrong hound. His spikes are longer and more numerous, and he can detach and fling his claws like knives.
Rahzar is likely to be an even bigger challenge to the Turtles than Dogpound!