Stone can focus his chi to enhance his durability. As long as Stone is aware of an incoming attack, he is capable of withstanding it. Stick also taught him a form of resurrection.
Stone was the favored pupil of Stick. He assisted Stick in training both Daredevil and Elektra. Stone was second in command of the team known as the Chaste. As a member of Chaste, Stone was a highly trained martial artist and assisted his sensei, Stick, against the Hand. (Stone's keen senses sometimes allowed him to detect enemies before even Daredevil can). Like the other members of the Chaste, Stone is deeply advanced in the art of chi-manipulation. An offshoot of this is his ability to render himself invulnerable to physical harm; however, only if he sees it coming. (Click on the highlighted names above to learn about the characters and/or teams. Note: Beware of the form-fitting and revealing outfits on Elektra's bio page.)
Once during a battle with the Hand, Stone was told by Stick to take Daredevil and Black Widow to safety. Although he wished to stay with Stick and Shaft, Stone followed his sensei's orders and took the two to safety. (Meanwhile, Shaft and Stick ended up sacrificing themselves to save the team). (To learn about the above highlighted characters, just click on their names. Note: Beware of form-fitting and revealing outfits on Black Widow's bio page.)
Sometime later Stone demonstrates more of his mystic powers when when he revived a decomposing Black Widow after she was exposed to molecular poison.
At one point, Stone assisted Daredevil when the Hand was attempting to resurrect Elektra as their agent. Afterward, Stone managed to restore Elektra and cleanse her soul using Daredevil's love for her and a portion of his own life force. However, this weakened Stone and he was believed to be dead.
However, several years later, Daredevil found Stone still battling the Hand.There is no bio on Marvel.com, but here in the link to Stone's bio page, http://marvel.com/universe/Stone_%28Chaste%29.
In the movie, Elektra, Stone is actually a member of the Hand (opposite of the comics). Much like the comic book, Stone is impervious to many types of attacks in the movie. However, there are two main differences with the Marvel movie version of Stone: he is African American and is about 8 feet tall.