Masochistic Shadow

Necromancy [evil, shadow]
Level: Antipaladin* 4, Artificer * 4, Bloodrager * 4, Magus * 4, Shaman * 4, Sorcerer */Wizard * 4, Warlock * 4
Components: V, S
Casting Time: 1 Standard Action
Range: close (25 ft. + 5 ft./2 levels)
Target: one creature
Duration: 1 round/level (D)
Saving Throw: Will negates, then Reflex partial, see text
Spell Resistance: yes
  You animate the target's shadow with semi-living energies drawn from the Shadow Plane, instilling a maddening hunger for its owner's life energy within it. If the target fails its Will Save, it takes 1d4 points of Strength damage as a quasi-real shadow manifests in its space and attacks it. This shadow remains attached to the target and moves wherever the target moves. At the start of each subsequent round, the target must succeed at a Reflex Save or take 1d4 additional points of Strength damage; a successful save reduces the Strength damage to 1 point. If its Strength score is reduced to 0 by this spell's effects, the target dies. If the target is in bright light, it gains a +2 bonus on Reflex saves against this spell. If the target is in Darkness, it takes a -2 penalty on Reflex saves against this spell.