DC Comics, New York, 1^st pr thus.  ISBN 1-56389-447-5.  Folio soft cover, 176 pages.  Near fine; small impression on rear wrap.  Originally published in single magazine format as Underworld Unleashed 1-3 and Underworld Unleashed Abyss-Hell’s Sentinel 1.  A demon named Neron offers villains of the DC universe increased powers to defeat their enemies, and makes other offers to the superheroes, but at the cost of their souls.