Black knight

the long version

"What do you do when it's your destiny to be damned? For centuries, that's the grave question that has plagued each wielder of the ebony blade--and all of them ultimately succumbed to the sword's curse. Now, as his own addiction to the weapon grows ever stronger, this shocking truth is laid bare to its current owner, the former Avenger Dane Whitman. Will this revelation be the reason he ends up in the strange and dangerous realm known as Weirdworld? Or are there other forces at work? Dane's past actions begin to catch up with him when the Uncanny Avengers hunt him down! And in the ensuing battle, will his stay in Weirdworld come to a premature end? It's swords, sorcery and one man's struggle to save his soul!"--Back cover.