prokopetz:

More inadvisable monsters for your D&D campaign:

• A mimic that consistently chooses contextually inappropriate treasure containers to impersonate, like a filing cabinet in elven ruins or a stone sarcophagus in the storage room of the local inn.
• An abnormally intelligent undead skeleton that indicates through elaborate pantomime that it wishes the party to sign a petition demanding better working conditions for its bony brethren. It’s unclear who – if anyone – the petition’s intended recipient is.
• A giant spider peddling fine leather jackets that it fashions from the hollowed-out skins of its prey. The player characters can be either customers or raw material – it cares not which.
• A gelatinous cube whose exceptionally precise dimensions have won the favour of the gods of Order, granting it both awareness and the power of speech. The endless hunger of its kind has become an obsession with sharing its perfection of form with the world: all shall be cubed!
• A horde of tiny, gremlin-like demons that secretly improve mechanical devices rather than sabotaging them. Their idea of “improvement” is peculiar, typically involving making the device in question go faster.