The unseen servant is a non-visible, 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 carry out only one activity at a time and can move only light-weight items - carry a maximum of 20 pounds or push or pull 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 eliminated after receiving 6 points of 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.
The material components of the spell are a piece of string and a bit of wood.