I am trying to find this story. The plot line is a fellow is exploring a cave and falls through the floor. He lands on another planet right in front of a Group of Orcs that have captives in cages. The captives are Black elves with magical power, Orcs of an opposing side in a war. The elves are actually the ruling family of that group.
The earth man falls in love with one of the Black elves. He also finds out he has strong magical powers on this planet. He also discovers that smoking pot greatly increase his and the locals ability to use their magic.
He rapidly helps his mate/wife's side in a war against an enemy with dark side type of actions. The characters such as a Litch, share a common type used in Dungeons and Dragons. ( A game after my time. LOL)
The main character be came known as Lord Stone or Storm IRC. The story is incomplete but is long enough to be a good read as is.