Your slam attack can deal a shock.
Prerequisite(s): Base attack bonus +3, shindroid.
As a free action, you can channel some of your life force into a slam attack. You must declare that you are using this feat before you make your attack roll. When you use this feat, you deal damage to yourself (any amount equal to or less than your base attack bonus). If the attack hits, you deal 1d4 points of lightning damage to the target per point of damage you dealt to yourself. For example, if you dealt 3 points of damage to yourself, a successful attack would deal an extra 3d4 points of lightning damage. If the attack misses, the attempt is wasted (but you still take the damage you dealt to yourself). You can attempt a shocking fist attack any number of times per day, but only once per round.