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School abjuration [force]; Level magus 1, sorcerer/wizard 1
Casting Time 1 standard action
Components V, S
Target creature touched
Duration 1 minute/level (D) or until discharged
Saving Throw Will negates (harmless) and see text; Spell Resistance yes (harmless) and see text
You place an invisible ward upon the target. The next time a creature succeeds at a sunder combat maneuver against the target, the attacker's weapon takes 1d6 points of damage per caster level (maximum 10d6). If the attacker used a natural weapon for the sunder, the attacker takes half this damage. Spell resistance applies to this damage. The attacker can attempt a Fortitude save to halve this damage.
The ward on the target counts as a magical trap and can be detected and disabled as such.