Snathe

Colonel Snathe was a commanding officer on the Betrothal of Sontar, a Sontaran mining ship that was searching for the Worldbane, which was believed to have been the most powerful superweapon ever created, on the icy world of Serac. He had the Sigil of Thanatos tattooed onto his chest to remind him of his search. (DWM: The Betrothal of Sontar)