I'm trying to track down an adventure that I've actually owned before, but since lost. What I can tell you is this:
-It had a red cover, was not long (less than 100 pages, I think), but spiral bound inside the cover.
-It took characters through a series of adventures revolving around three heroes who had done many things in the past and their possessions were left at these adventure sites.
-Of those heroes, one was a wizard, one was a warrior, and I think one was a rogue.
-The climactic battle involves the PCs facing those (now ex-) heroes in combat, in which all three are liches.
-I think the wizard was named Ren.
-d20, 3E era.
-It had a red cover, was not long (less than 100 pages, I think), but spiral bound inside the cover.
-It took characters through a series of adventures revolving around three heroes who had done many things in the past and their possessions were left at these adventure sites.
-Of those heroes, one was a wizard, one was a warrior, and I think one was a rogue.
-The climactic battle involves the PCs facing those (now ex-) heroes in combat, in which all three are liches.
-I think the wizard was named Ren.
-d20, 3E era.