Unseen servant

The unseen servant is an invisible, mindless, and shapeless force, used to step and fetch, open unstuck doors, and hold chairs, as well as to clean and mend. It is not strong, but unfailingly obeys the command of the wizard. It can perform only one activity at a time and can move only lightweight items, carrying a maximum of 20 pounds or pushing/pulling 40 pounds across a smooth surface. It can open only normal doors, drawers, lids, etc. The unseen servant cannot fight, nor can it be killed, as it is a force rather than a creature. It can be magically dispelled, or destroyed by taking damage from area-effect spells, breath weapons, or similar attacks. If the caster attempts to send it beyond the allowed radius, the spell ends immediately.

Note: This version of unseen servant originally appeared in the 2nd Edition Player's Handbook for Advanced Dungeons & Dragons from TSR. Its use here is for the purposes of providing context for the campaign only.