A large chest made of Sapient Pearwood. It can produce hundreds of little legs protruding from its underside and can move very fast if the need arises. Half suitcase, half homicidal maniac. Its function is to act as both a luggage carrier and bodyguard for its owner, against whom no threatening motion should be made. The Luggage is fiercely defensive of its owner, and is generally homicidal in nature, killing or eating several people and monsters and destroying various ships, walls, doors, and other obstacles. Its mouth, the feature often remarked upon by those it is about to consume, contains lots of big square teeth, white as sycamore, and a pulsating tongue, red as mahogany. [ https://discworld.fandom.com/wiki/The_Luggage ] Instinct: find it's owner

• store away

A hide like plate armor and great crushing mandibles are problematic. A stomach full of acid that can burn a hole through a stone wall makes them all the worse. They’d be bad enough if they were proper insect-sized, but these things have the gall to be as long as any given horse. It’s just not natural! Good thing they tend to stick to one place? Easy for you to say—you don’t have an ankheg living under your corn field. Instinct: To undermine

• Undermine the ground
• Burst from the earth
• Spray forth acid, eating away at metal and flesh