Familiar Double

Illusion (Shadow)
Level: Warlock * 7
Components: V, S, M (a small replica of you worth 5 gp)
Casting Time: 1 Standard Action
Range: medium (100 ft. + 10 ft./level)
Effect: one shadow duplicate
Duration: 1 round/level (D)
Saving Throw: Will disbelief (if interacted with)
Spell Resistance: no

This spell functions as project image, except the image appears in your familiar's square and moves when your familiar moves.