Lorloveim's Creeping Shadow

This spell causes the wizard's shadow to elongate, stretching away from his body at a rate of 15 yards per round. It can elongate a maximum distance of 10 yards per level of the caster. The shadow moves as an ordinary shadow, along floors and up walls. The caster may maneuver in any manner feasible to place the shadow where he desires. A caster might position his shadow over a high window in a tower in order to spy on the tower's occupants. The shadow makes no sound and is 90% undetectable in all but the brightest surroundings.
While the spell lasts, the illusionist can see, hear, and speak through his shadow. The shadow cannot physically touch, pick up, or attack creatures or objects. It can be struck only by spells, magical weapons of +1 or better, or other special attacks (such as a dragon's breath). The shadow has the same Armor Class as the caster. Hit points lost by the shadow are suffered by the caster.

[Tome of Magic]

School: Illusion
Level: 3
Rarity: Rare

Range: 0
Components: V, S, M
Duration: 1 round/level
Casting Time: 7
Area of Effect: The caster's shadow
Saving Throw: None

Material Components:
a light source of at least the brightness of a candle must be present, and a small statuette of the caster sculpted from a piece of obsidian worth at least 1,000 gp