During the God Wars, she and her sisters hunted and killed those who broke their oaths with Zamorak. After Zamorak returned, they led a pack of hellhounds to hunt down the remaining Dragon Riders loyal to Zaros, eventually finding Morvannon and tearing her apart, even though she had changed sides. Satisfied with their work, they continued their services to Zamorak, although they would eventually learn many years later that Morvannon may have had an egg, despite the common belief that the Illujanka were infertile.
At some point after the God Wars, Avaryss' and Nymora's sister was killed by Gregorovic. The duo continued their service for Zamorak, while searching for Gregorovic at the same time so they could exact their revenge.
When Zamorak returned to Gielinor in the Sixth Age he pointed out that it was possible that Morvannon's dragon Gorvek could have escaped with an egg. Though the sisters desired revenge on Gregorovic for their sister's murder, Zamorak refused to let them do so until they had eliminated the Ilujanka child. This eventually led them to The Heart where they met both Gregorovic and the Dragon Rider Vindicta, who had survived their genocide millennia ago.
Avaryss yells at Helwyr after the latter attempts to have his revenge on Gregorovic for killing his clansmen, stating that she and Nymora will get their revenge on him for killing their sister. After a short but heated discussion, the two call upon the forces of Zamorak to claim the Heart in his name.
^ abcdefgThe drop rate of this item can be increased with faction reputation. At 100% drop increase, the drop rate of this item is doubled. The drop rate of this item is increased in challenge mode. The drop rate of this item has its denominator multiplied by 0.99 when wearing a Luck of the Dwarves ring.
Prior to a patch on 4 April 2016, players were able to receive duplicate drops of the same pet if they did not own both Ava and Nylessa pets. E.g. Avaryss' braid could be dropped multiple times after the user unlocked the pet, but before they have unlocked Nylessa pet.