Evocation [Force]
Level: Sor/Wiz 3, Ret 3
Components: V, S, M/DF
Casting Time: 1 action
Range: Personal
Targets: See text
Duration: 1 minute/level
Saving Throw: None
Spell Resistance: Yes

As per the lesser armor of thorns, but deals 1 point of damage per level of the caster, per round, per opponenent that engages the caster in melee combat. Thus, a 7th-level caster could deal 7 points of damage to the orc that just struck him with a scimitar, and 7 points of damage to the orc's bulette steed if it bit him or trampled him -- but no damage to the orc archer that just struck the caster.