The ogre mage Dentarg was one of the most trusted servants of Ner'zhul prior to the destruction of Draenor. Dentarg was, and had always been, unquestioningly loyal to Ner’zhul, and was known for offering the heads of traitors as trophies to his master. Some of Dentarg's most famous exploits include retrieving the Skull of Gul'dan from a Bonechewer Clan Captain, employing both the Thunderlord Clan and a group of Shattered Hand Clan warriors. He also personally oversaw the defeat of the Bonechewers and Thunderlords during an uprising before the second crossing into Azeroth, as the two clans refused to follow Ner'zhul's orders.