Silvermane

From Spider-Man Wiki

Silvermane is a fictional character and a villain in spiderman. His real name is Silvio Manfredi and he is known as Silvermane because of his gray hair. He has been living since the Aztec times because whenever he gets old he would go to this temple that would have this thingy that would make him young again. In present day where Spiderman is 16 he is a man in his 60s or 50s. He has a daughter called Silver Sable. She is a mercenary that is Peter Parkers age. Silvermane has invented a robotic suit to battle his opponents. He fights spiderman. He later forced Dr Curt Connors to make a mystical serum that could make him young. He drunk it in the fight with Spiderman. He became a man in his 20s. But later it keeps making him younger and younger. Hes a teenager and then hes a tween. Then hes a kid. Then hes a toddler. Then he turns into baby and then he turns into an unborn baby and then he vanishes. Silvermane later reappeared where he was a man in his forties. He has fought Spiderman numerous times.