Folding Knight

Source: Natalie's Setting

Wondrous Item, very rare

A small, nearly flat, box made out of intricate gears, plates, and wires. When set on the ground and the command word "cooperate" spoken it unfolds into a construct with the same statistics as Animated Armor. It can follow basic commands, as per the Unseen Servant spell, thought it can also be ordered to attack, defend, or watch. Once summoned it can remain open in 10 minute increments. Once closed it must rest for 1 day for each 10 minute increment it was opened. It can be open for a maximum of 60 minutes.

It can also be ordered to stand guard, which it can do for up to 1 hour. In this mode it presses against a wall and communicates with the creature which gave the order. When an hour is up or when ordered to collapse it folds back into a box and must remain in that form for 7 days.

It's name is Jormin.

If destroyed it can reassemble itself, taking 1 day for each hit point beyond zero it lost. If it drops to negative 30 hit points, it is destroyed.