User blog comment:CNBA3/Kyouka's Magic/@comment-7418318-20131004154312/@comment-7418318-20131004174147

The only instances of anyone growing extra limbs I remember are the Jinjuuriki forming the beast-chakra into arms (or literally growing them like Killerbee does all the time), that weird anime-only Firetemple jutsu that Asuma and his twelve guardian shinoby buddy used and maybe Susanoo, if you want to count it.

... and of course Orochimaru barfing out multiple snakes all the time.