Stolen from white_aster because it looked fun

You give me a summary for a story that I never wrote -- for example, "The crossover where Hojo was in charge of the Asura Project!" Prompt with as much detail as you feel is necessary, including pairings and warnings if you're so inspired.

I give you a line from a crucial scene in the unwritten story.
"The brand on his arm throbs, hot lines of pain and change streaking out from it, and Zack feels his flesh twisting, burning, reforming, and the voice in the back of his head howls feed me."

AUs and crack utterly welcome; Suikoden fandom preferred, but I'll do other fandoms, too. I reserve the right to get carried away with the "unwritten" story.