He is thought to be dead, killed by Xavier, but he is revealed to be alive at the time of Dark Blood. He is one of the three Dark Mages, along with Xavier and Xaviero. However, it is revealed by Branislava that Xayvion was used in a spell that would enslave the living, just like Xaviero before him. Branislava and Tatijana's blood had been put in a chalice from whitch Xavier and Xayvion drank from. When a beautiful mist was created around the two brothers, Xavier stabbed his brother and then, dragged the body from the labratory. However, due to the fact that the triplets all looked alike, there was no real way of knowing which did what or at what time. He was the more quiet than his brothers, never seeing anyone or anything as alive. Xayvion often sounded dead when he laughed and he favored smells when incense were used in his spells.
It appeared that, while Xavier when after Carpathians, Xayvion focused on the jaguar race and Xaviero on Lycans.