You cloak yourself in sharp spikes of darkness. Although they are weightless and do nothing to impede you, your foes soon discover that they are not so lucky.

A creature striking you with its body or a handheld weapon takes 1d6 points of damage +1 point per caster level (maximum +15). A creature wielding a reach weapon, such as a longspear, is not subject to this damage if it attacks you. If the attacker has spell resistance, it applies to this effect (unless you used the mystery as a supernatural ability). Damage from sharp shadows is not considered magical for the purpose of overcoming damage reduction, and the effect is not considered a weapon for the purpose of spells such as align weapon or magic weapon.