Evil of the Ancients (#9), softback adventure for Mutant Crawl Classics, by Michael Curtis
“A Level 3 Adventure for MCC RPG!
For centuries it has lurked in the dark, forgotten by man and mutant – a terrible entity left behind by the Ancients’ meddling in cosmic forces they did not fully understand. Trapped in this world, this alien intellect seeks only to escape, but to do so, it requires lives. What the adventurers think is just another forgotten vault left behind by the Ancients may in truth contain the most terrifying threat they’ve ever face: the Evil of the Ancients!”