- “I am not the sort of man you want as an enemy.”
- ―Cyvus Vail
Cyvus Vail was one of the most powerful beings in Los Angeles, with metaphorical tendrils extending throughout the city, obtaining and ensuring his power thanks to his vast wealth, his magical power and his membership of the Circle of the Black Thorn.
After Angel agreed to take over the Los Angeles branch of Wolfram & Hart in exchange for a new life and memories for Connor, Vail was the leader of the elite team of powerful sorcerers hired by the firm to reshape reality and alter the memories of those involved in Connor's life. Afterwards, Vail kept an Orlon Window, a magical artifact that allowed him to observe reality as it was before the alteration.
In the following months, Vail managed to obtain the Resikhian Urn in which the demon Sahjhan, had been trapped by Justine Cooper. Sahjhan was an old enemy of Vail, and had tried to kill him many times, for which Vail sought to have the prophecy of the Nyazian Scrolls (The one sired by the vampire with a soul shall grow to manhood and slay Sahjhan) fulfilled.
In order to recruit the one prophecized to slay Sahjhan, Vail sent his minions, Kith'harn demons, to harass Connor's new family, the Reillys. Afterwards, Vail threatened to restore Connor's memories in order to force Angel to prepare Connor to kill Sahjhan.
Connor managed to slay Sahjhan, though only after Wesley Wyndam-Pryce smashed the Orlon Window. Afterwards, Vail disappeared until Angel was inducted into the Circle of the Black Thorn.
When Team Angel decided to wipe out the Black Thorns, Wesley is selected to eliminate Vail due to both being warlocks. Angel also sought to exploit the fact that Vail believed Wesley was unstable enough to make a move for Angel's position.
Vail welcomed Wesley into his mansion but was weary of his intentions. After the ex-Watcher attacked him, Vail unleashed his power against Wesley, eventually subduing him telekinetically and stabbing him in the stomach. However, Vail had little time to savor his victory, as he was then killed by Illyria, who smashed the old demon's skull with a single punch.
Powers and abilities
- “You don't know who you're dealing with, do you, boy?. I mean, really. I crap better magic than this.”
- ―Cyvus Vail[src]
Vail's advanced age had left him physically weak and forced him to constantly receive transfusions of blood and other nutrients to remain alive. However, while his body was frail, he was unrivaled in the field of magic. Not only he had developed telekinesis and was capable of surviving magical energy blasts, but he was also capable of manipulating memories and reality itself.