K'Varn

Main enemy from the Underdark arc. Beholder. Bore the Horn of Orcus and was using it to create necromantic amalgams that threatened Kraghammer.
Kraghammer itself was actually relatively unconcerned with the threat of the amalgams, but Lady Kima of Vord received a vision from Bahamut warning her of the deeper threat that K'Varn posed.
Dominated the Elder Brain of the Yug'Voril mind flayer colony.
Killed by Vox Machina.