An ancient, omnipotent entity known as Master Mirror or the Man of Glass.
Gaunter O’Dimm appears as a humble merchant of mirrors, but he is a malevolent, near-godlike entity who toys with human souls. He grants desperate people their deepest desires through complex contracts, only to twist the terms to ensure their ultimate ruin. He can manipulate time, space, and reality, making him one of the most enigmatic and truly terrifying forces Geralt of Rivia has ever encountered.