Batman:The Animated Series Wiki

Jason Blood is a world-famous occultist who actually originated from Arthurian times. Formerly one of King Arthur's knights, he was magically bonded with the demon Etrigan by Merlin for betraying Camelot.


Jason Blood was once one of King Arthur's knights during the age of Camelot. He was seduced by the witch Morgaine Le Fay, who promised him that they would rule Camelot together if he helped her take over Camelot. He betrayed his King and his people by opening the gates of Camelot to her invading armies, effectively sealing the kingdom's fall.

However, Blood was ultimately only a pawn in Morgaine's plot to allow her son, Mordred, to rule as King; she poisoned him with a viper's kiss.

As Blood lay writhing from Morgaine's poison kiss, Merlin appeared to the dying Knight. As punishment for his betrayal, Merlin bonded Blood with the demon Etrigan, "one of the vilest demons in Perdition". He was forced to hunt down Morgaine for all time, but he never succeeded, as she wore an amulet that enabled her to detect his presence.Centuries later, Blood had become a recognized occultist, and used his bond with Etrigan to fight off beings of evil magic. Batman would seek out Blood's help in cases that involved the supernatural. At one point, Etrigan and Blood were separated by Klarion, and Batman had to reunite the two before Blood aged rapidly to death.