Cultist's Lair Part 2: Tomb of the Secret Boss (Public) (Patreon)

The stairs so long concealed in the lair above lead down, deep into the earth. The stale air and utter silence of the place are disturbed only by the torches burning on either side, lighting your way to a large stone door. A small socket lies waiting for its key, the golden staff hidden away in the dilapidated passage above. An instrument of the last warden of this pale mausoleum, and the terrible power imprisoned within, both long forgotten. However one manages to breach the door, silent stone sentries stand guard over six sarcophagi. The seventh, and most terrible, depicts a shrouded figure carved in stone, the lid chained to the stone floor. But are the chains to keep robbers from getting in, or to keep what's inside from getting out?

This is the second part of a 2-part dungeon I came up with for a one-shot I've planned for my friends. The first floor at first appears to be a generic hideout for a necromancer's cult or graverobbing bandits using it as a convenient hideout. But, if players are assiduous enough, they might find the magic staff used by the original clerics who occupied this tomb to keep their wayward brother imprisoned in secret, and the hidden stairway leading down to his resting place. With enough luck, they might gain entry, only to watch as the rusted chains holding the lid in place begin to quake, and hear the scrape of stone as the rest of the sarcophagi push their lids aside and crawl out to repel their intruders.

It's just an idea I had. I hope you all enjoy :)