M3 Twilight Calling

Through seven gates lie seven realms.
In seven realms stand seven guardians.
With seven guardians lie seven symbols.
From seven symbols comes one key.

Alpahaks the Dark desires that key, by which he plans to release death and chaos into the realms of man. Your party may be all that stands between life and death. Will you heed the lunatic ravings of a dying madman? Travel to the top of Guardian Mesa, and enter the Septahenge. Gather the mystic symbols, create they key, and defeat the Carnifex, before it's too late...

TSR 9174