Portals: A Dungeon Crawler Adventure
Holk, a veteran warrior of many campaigns stumbles into a subterranean world from which there appears no escape.
He discovers a network of caverns, lakes, and fungal expanses; each area isolated from the others. The only avenue from one to the next lies through a series of portals.
Within this world he meets a mysterious being known only as The Merchant; a dragon; and a small human boy-child