Dredgen Yor

Dredgen Yor was a Hunter and the last known carrier of the exotic Hand Cannon Thorn, which he claimed to have created himself. He was once regarded as a heroic Guardian and was unstoppable in the Crucible, but he delved into the dark mysticism of the Hive and eventually turned against his fellow Guardians, murdering Pahanin Errata, Thalor, and at least three other innocent people.