While playing Kingmaker today, we decided we really wanted a spell like this.
School conjuration (creation); Level bard 3, summoner 3, witch 3, wizard 3
Casting Time 1 standard action
Components V, S, M (a two inch square of paper)
Range close (25 ft. + 5 ft./2 levels)
Effect on invisible, mindless, shapeless servant
Duration 1 day/level
Saving Throw none; Spell Resistance none
Boshalen's courier is an invisible, mindless, shapeless force that can be sent great distances to deliver an item or retrieve an item. It has an effective strength score of 4 (so it can lift 40 lbs. or drag 200 lbs.). It can communicate telepathically with any creature that has a language. When created the courier will deliver one item or set of items in a container to another willing target or travel to another willing target to retrieve one item or a set of items in a container. The items must be given and received freely. Its base speed is 40 feet.