Wolverine

"A star member of the X-Men, whose long, checkered, and mostly forgotten past remains a mystery to him. Wolverine possesses heightened senses, making him capable of seeing things at a maximum distance greater than that of a normal human. His hearing is enhanced in a similar manner, and he is able to recognize people and objects by scent, even if that person or object is hidden. Logan can use these enhanced senses to track anyone, with an impressive degree of success. He possesses retractable claws that are housed in his forearms. At will, Wolverine can release these claws through his skin between the knuckles on each hand. Lastly, Wolverine possesses an accelerated healing factor based on his physiology. While most normal humans heal injuries over a long period of time, Wolverine's healing factor speeds up that natural process." -Marvel Comics