Trembling of an Ancient Web

From the introduction: Like the thin threads of a spider's web, so too do the threads of history part to reveal that which came before and give guidance into the future. What you read from the past is what everyone else reads; but what you make of the past and how you let it guide your future determines the verisimilitude of your actions. How will the past influence your future? Discover the answer, if you dare, within ancient ruins, cloaked in a miasma of webs, none of your fashioning. User summary: For 1st - 20th level characters.