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.
Dentarg assisted greatly in Ner’zhul’s scheme, but remained behind when Ner'zhul retreated to the Black Temple to perform the ritual. During the battle with the Sons of Lothar, Dentarg entered into a duel of magic with the Archmage Khadgar of Dalaran, who led the Alliance Expedition. Both were evenly matched, but in the end Khadgar was victorious, weakening the ogre enough so that he was able to remove Dentarg's head. ( )
See: Quotes of Dentarg.
- In Warcraft II, Dentarg, as with all ogre characters in the game, is shown and speaks with two heads. In the novel Beyond the Dark Portal, he appears to only have one, as all mentions of a head are singular. Furthermore, when Khadgar defeats him, only one head is cut off, ( and it is unlikely that Khadgar would only have removed one (though the loss of one head would have likely resulted in death anyway).
- In Warcraft II, Dentarg's heads spoke in perfect unison and did not argue. But he did refer to himself as we.