(CNN)Iron Mike is back.
In a pair of training videos posted on his Instagram page, Mike Tyson, 53, showed off his agility and power as he hit the pads with a trainer.
"I'm back," Tyson, sporting a gray beard, declares at the end of the video.
"It may not be over yet," Tyson said in a Facebook livestream. "Anything's possible. I feel unstoppable now. The gods of war have reawakened me, ignited my ego and want me to go to war again. I feel like I'm [young] again."