Bloodwynd is the descendant of a group of slaves enslaved by a man named Jacob Whitney. These slaves created the magical Blood Gem and used it to kill Jacob Whitney. It was subsequently passed down among the slaves' decendants. Without them knowing it, the Blood Gem was a gateway to another dimension, and the demon Rott claimed the souls of those who were killed by the Blood Gem.
In recent times, Rott sucked Bloodwynd into the Blood Gem and mind-controlled the passing Martian Manhunter into wearing the Blood Gem and impersonating him. Using Bloodwynd's identity, The Manhunter joined the Justice League as one of their more mysterious members. When the JLA fought Doomsday, Superman and Blue Beetle realized Bloodwynd's identity when Bloodwynd was surrounded by fire.
In the comic version, Bloodwynd refused to be taken along with the others to go get treatment and instead mysteriously disappears. Bloodwynd also blames himself for the fire incident, to which the Martian Manhunter was especially vulnerable. Once the Manhunter was freed of mental control, the Justice League battled Rott and freed Bloodwynd.
Bloodwynd joined the Justice League after they freed him from Rott's control. Later, he withheld information from the Justice League about an offer of alliance from the mystical villain Dreamslayer. Bloodwynd did not join Dreamslayer, though sensing a strange kinship with him, Bloodwynd would not oppose Dreamslayer either.
During the Overmaster storyline, Bloodwynd was strangely inactive, refusing to take action against what he said to be a natural course of events. These two incidents caused Bloodwynd to question his membership in the Justice League. He voluntarily put himself on reserve status.
Later, Bloodwynd reveals more about the nature of his morality and powers, and punishes a drug dealer by forcing him to experience the pain of his victims.
Bloodwynd officially joins the emergency expansion of the Justice League in order to battle Amazo. The battle goes badly as most of the JLA are defeated and their powers copied. Amazo loses his powers when Superman officially disbands the league.
Day of Judgment
He was last seen during the Day of Judgment storyline and in JLA Black Baptism serving as a member of Sentinels of Magic. In the later storyline, he was badly injured by the Diablos, a group of Mafia-styled demons who wished to gain revenge for demons slayed during the Day of Judgment.
During his first several appearances, Bloodwynd shared his form with Martian Manhunter and as such derived many of his powers from that union. It is unclear how many of the abilities he displayed during this time were Bloodwynd's own and how many were simply the Manhunter's powers in disguise. Shortly after the secret was revealed Manhunter himself hypothesized that most of the powers his teammates observed were actually his own and not Bloodwynd's.
After their separation Bloodwynd still illustrated a wide array of powers, such as summoning the spirits of the dead, the ability to give himself life energy and also increased strength. He has the power to know where death has occurred and has the ability to inflict a victims pain on their attacker. The blood gem on his chest is the source of his mystical powers.