Obingo
From Tardis Wiki, the free Doctor Who reference
Obingo was the king of a tribe in Congo. He killed Abasi's father, King Gaheji, and took his kingdom. He called himself Obingo the Death Dealer, Keeper of Dark Magic.
He wore around his neck the link of the Coronoa of Alsion, which he used to revive people endleslly to kill them.
He was eventually defeated when Abasi completed the challenge of the Corona, he put the link back into place on the Corona, and the Corona revived the slaughtered victims of his wars, who came back to chase and kill him. (AUDIO: The Ghosts of Gralstead)
