Kelthas

Kelthas the Dread was a necromancer bandit in the 14 century DR.

History
Around 1347 DR, thanks to an earthquake, Kelthas with his apprentices, together with Jorykul and his acolytes, managed to enter in Illefarn.

Despite being defeated by an adventuring party, Kelthas returned as an undead being to torment the dwarven Clan Ironeater. Kelthas was defeated again but in 1485 DR rumors said he still haunted the place.