Shadowman Wiki

Mike with the Mask of Shadows on the N64 box art

The Mask of Shadows is a mask made out of bone that is implanted by Mama Nettie in Michael LeRoi's chest, held together by his ribs and voodoo magic.

mask being put on Mike '97 comic

All of the other Shadow Men, including Jack Boniface, wore the mask on their face. Michael LeRoi has the mask sewn into his chest because Nettie's voodoo powers were weak and she had to "cut corners" due to this technicality. Mike is a slave to the mask, but he can use it to channel his powers of the Shadow Gun to defeat the duppies of Deadside and prevent them from coming into the land of the living.

Jack Boniface ('92) with mask on his face