Waervaerendor shared an unusually powerful empathic link with his twin Voaraghamanthar. They truly acted as one soul in two bodies and their greatest fear was that someone would discover their secret.
From a young age, Voaraghamanthar and his twin desired immortality but they were not interested in the normal dracolich transformation. However, they believed that Chardansearavitriol's condition was somehow different and tried to replicate it.
Both dragons were able sorcerers. Waervaerendor liked face-to-face discussions with others.
They saw most other creatures only as food or annoyances to be quickly disposed of. The exceptions were adventurers and other dragons. They avoided other dragons, not out of fear but in order to avoid being discovered as twins. Adventurers, on the other hand, they viewed as tools too useful to be killed and the Black Brothers needed to recover too many artifacts to not use adventurers that agreed to work for them.
The Black Brothers patrolled their domain efficiently. If they detected other dragons, they retreated underwater to avoid conflict, unless the visiting dragons were trying to settle in the mere. In that case, they fought to the death to kill the intruders and keep their secret. If they detected adventurers, Waervaerendor would spy on the group to see if they could be useful for the brothers. Usually, he appeared to scare the party, before calling himself by his brother's name and proposing a deal. He could detect all tricks or attempts to deceive him. If negotiations failed, Waervaerendor briefly attacked before proposing a deal again. If negotiations failed again, Voaraghamanthar intervened and the Black Brothers killed the adventurers.
Waervaerendor and his twin Voaraghamanthar hatched in the Mhair Jungles, and thanks to their empathic link they managed not to kill each other before hatching. On the contrary, they killed all their other siblings and fled before their parents came back.
After wandering Faerun for a time, they finally found a home in the Mere of Dead Men, attracted by the isolation of the place and legends about the hoard of Chardansearavitriol and the treasures of flooded Uthtower and other realms. They especially hoped to find the lost Twin Crowns of Myrmoran, reputed to have enhanced the empathic bond between the fraternal monarchs of Uthtower and Yarlith and granted them magical powers.
They started posing as only one dragon, named Voaraghamanthar, and soon tales were told across the Realms about the legendary Wyrm of the Mere, a strange black dragon that could appear out of nowhere to assault adventurers.
Despite not being really interested in becoming dracoliches, they approached the local Cult of the Dragon cell to use them for their plans. Thanks to the cultists, the Black Brothers recovered one of the Twin Crowns of Myrmoran.
In 1372 DR, they captured a Helmite adventuring party and planned to use them to search for the Twinned Crown of Uthtower, the second of the Twin Crowns of Myrmoran. With both crowns, Voaraghamanthar and his twin hoped to increase their powers.
- Dragon #258: "Voaraghamantar, the Black Death"
- Wyrms of the North: Voaraghamanthar, "the Black Death"