Black Jubal is the ghost of a one armed slave. About a century after his death, The Swamp Thing and Anton Arcane fought an epic battle over Black Jubal's grave. The battle woke the spirits of Jubal and the other slaves buried in the grave site. The ghosts, angered by Arcane's twisted nature, brainwashed his Un-Men to attack their master. They tore Arcane's body apart and buried each limb in a separate grave.
As the Swamp Thing awoke, Black Jubal the Un-Men were gone. The Swamp Thing left the grave site, thankful for Jubal's help with saving his life.