Dalsharn the Unworthy

Dalsharn was a legendary warrior who had fought in several battles. He first made his name battling fierce yetis, he later went on to lead the charge in the Goblin Wars, defeating their hordes.  
During a battle with an ancient lich he suffered a wound from a blast of necrotic energy. This would leave him mortally wounded.  
He went to seek help from the Druids of Bastia. Before they could determine a way to cure him, he turned into a wight. In hopes of pulling him back from death the Druids sealed him in the lowest section of their barrow.
Several hundred years later a group of adventurers exploring the forgotten barrows discovered Dalsharn still suspended in the magic prison the Druids contained him in.