What's the worst thing to find in the entrance of a dungeon?

What's the worst thing to find in the entrance of a dungeon?

A note that says "We already looted everything of worth in this dungeon."

Another Ribbon thread.

Sphere of Annihilation

Ennui

A seamless portal to the Tomb of Horrors.

The end of the dungeon.

3 gnomes and a bucket

An impaled castrated man with his own testicles on his mouth.

Your own corpse from the future.
Also a magical realm.