Revenant
From Jenny Everywhere Wiki
Revenants were a type of undead.
In the Parallax Universe, the Vampire King's lair was guarded by two revenants, whom Fiona slew when she, Jenny and Kim took on the King. She stabbed one through the ribcage with her sword, and simply tore the other one to pieces in her lupine form. (PROSE: Camera Shy)
According to the 38167th Universe's Laura Drake, the Beastmaster was a revenant, making him functionally indestructible. (COMIC: Jenny Everywhere and the Master of Monsters) He was also a revenant in the 925th Universe, where this was a well-known fact. (PROSE: A Very Jenny Over-There Christmas)