Snowman

Malcolm Avery broke one of the rules of running drugs in that he was fond of “sampling” the merchandise. Indiscriminate mixing of experimental designer drugs, perhaps along with some quirk in Malcolm’s genetic makeup, led to a “bad trip” where he literally petrified before his horrified posse’s eyes, then crumbled into sparkling, white dust.
He did not die, however. Instead, Malcolm was transformed. He gained the ability to shift in and out of his new form at will. With his new metamorphic form, “Snowman” (as he became known) quickly became a force to reckon with in the Jamaican underworld, one the local authorities had no chance against.
In spite of his name, Snowman’s powers have nothing to do with ice or snow; his transformed body is actually made up of a silicate material like fine, white sand, which he can shift and reform at will, including firing “snowblasts” of grit like a sandblaster.