I think I read the first book in this series in the late 90s. I never read any more, because it was too dark for me, so I don't know how many books were in the series, or if it was ever finished.
The main protagonist is a Mesoamerican warrior who is captured by the Aztecs. He manages to kill several Aztec warriors in ritual combat, despite only being allowed to use flimsy weapons, because he's so awesome. He then demands the honor of being sacrificed. At the point of death, he is summoned to a fantasy realm by a priestess or female magic user, who binds him to the realm with sexual acts which (if I remember correctly) cost her her life by transferring her life force to him.
He has been summoned to this realm to defeat an army of evil. He meets a pair of Viking warriors who discuss this "afterlife" with him and admit that it's not quite the Valhalla they were expecting. He is somehow able to watch as European forces with cavalry and firearms destroy both his people and the Aztecs, and uses their tactics against the invading force. Or he's going to. I don't remember if there was a climactic battle in the book.
I also remember a Templar character who captured and raped a woman. There was a race of blind underground creatures. I don't remember what they were called, but I pictured them as the troglodytes from heroes of Might and Magic. I believe the troglodytes were central to the attack on the protagonist and the summoners. I don't think they were the only attackers, but I seem to recall they were the main force. Anyway, the inquisitor and the woman are captured by the troglodytes and she tricks them into torturing him to death. As I said, it was too dark for me. However, it was different/interesting enough that I'd like to find a plot synopsis for the remaining books, if they exist.
