Panthera Helix
The Obsidian Brotherhood, a mysterious Black Supremacist organization, has developed a biomedical serum that turns men into physically perfect, massively endowed sexual predators. The Brotherhood's serum-enhanced operatives work to bring down the existing white-dominated society and replace it with a system where sexually-dominant black men rule, primarly by fucking white women into submission with their oversized cocks.
(As many readers will note, the premise of these stories borrows heavily from Stormbringer's E&I universe. The tone of my stories, however, is darker and more sinister.)