John Greycrow is a fictional mutant character appearing in American comic books published by Marvel Comics. Originally known as the villain Scalphunter, the character first appeared in The Uncanny X-Men #210, and was created by Chris Claremont, John Romita Jr. and Dan Green. Greycrow has the ability to manipulate mechanical constructs into any form he desires, as well as superhuman regeneration. The character was a longtime member of the supervillain group, the Marauders, but joined a superhero team, the Hellions, during the Krakoan Age of X-Men comics.