Brother Blood's History
After obtaining the security codes for Titans East Tower with the help of Steamroller, Blood and his robot troopers conducted a mass attack on the Titans East. While Cyborg apparently managed to evict Blood from the Tower, or should he say the H.I.V.E Academy, Blood had already gained two important footholds: he had already captured and taken control of the minds of Aqualad, Bumblebee, Más y Menos, and Speedy, recruiting them as his new "students", and hidden himself in the basement of the Tower, where he had himself converted into a cyborg by Professor Chang, who was mind controlled as well.
With the help of his brainwashed victims, Blood captured Cyborg for interrogation. In the course of their past confrontations, Cyborg's resistance to Blood's mind control had puzzled Blood. With Cyborg's nifty cybernetic implants enhancing his mental powers he would be able to control thousands of students in Steel City once they've been upgraded with the proper hardware,
In the interest of finding out what gave Cyborg the resistance, Blood intended to take Cyborg apart, but not before the Teen Titans arrived to save their friend. Thinking that this was due to a special gadget within Cyborg's systems he had not yet discovered, he intended to convert the Titans East into cyborgs as well for studying purposes (which will render them incapable of breaking free from his control), only for the Titans to stop him. Blood then ordered the Titans East (who were not upgraded yet) to fight the Titans.
During the scuffle between the original Titans and Titans East, Blood kidnapped Cyborg for a personal confrontation on the Tower's roof. After disabling Cyborg, Blood physically and psychically attempted to make Cyborg reveal the secret of his mental resistance. In the process, however, he unconsciously tapped too deeply into Cyborg's mind, and when Cyborg finally realized that it was actually his human mind and spirit which had enabled him to resist Blood, he exerted his will, tapping into Blood's powers in turn and using them to repair the damage inflicted on him, and then shattered Blood's cybernetic arms, rendering him helpless.
Following this crushing defeat, Blood was taken into custody. He was taken to prison and never appeared again.
Brother Blood is one of the few villains to not be seen joining the Brotherhood of Evil at the end of Homecoming - Part 2, along with Slade, Trigon, Krall, Blackfire, the Cironielian Chrysalis Eater, the Shrieker, and the White Monster. Where Trigon, Krall, and the Cironielian Chrysalis Eater are dead, the Shrieker is trapped at the bottom of a gorge, and the White Monster didn't appear until the final episode, Blood's absence, like Slade and Blackfire, remains a mystery.
