"A break-in at the mausoleum of the ancient God-Emperor Shummanla-shamash brings the party face-to-face with undead Yuan-ti raised to rob the tomb. The burial mask that held a spark of the god-emperor’s divine essence has been stolen, and the ghost of the god-emperor himself asks the party to return it to the tomb before the thief can steal its divine power for themselves. The party’s investigation leads them into the deadly in-fighting between the local Yuan-ti cults, pitting them against a heretic necromancer who will stop at nothing to subjugate his abominable kin. Mask of the God-Emperor is a D&D 5e one-shot adventure for a party of 4 characters levels 3-5." (Author Summary)