R: touch; T: object; D: [dice] hours
You enchant a sharp object to easily pierce solid surfaces. It remains enchanted for the duration or until used. It can be driven into the ground to trap a creature or object’s shadow in place. The creature must be of [sum] HD or less. The trapped creature or object can only move in such a way that their shadow never leaves the nail, and they will be thrown if lighting causes their shadow to suddenly jerk.
The effect is permanent until the nail is forcefully removed. If [sum] is 5x greater than the creature’s HD, it cannot remove the nail itself. If the creature is killed while their shadow is nailed, the shadow peels off their body and within 1 minute becomes an undead shadow outside your control.