Valeska's Charged Weapon

 With a touch the weapon suddenly crackles with brilliant arcs of lightning that doesn’t affect the weapon or its wielder.  On a hit the lightning strikes the target with a crack of thunder.  This spell causes the touched weapon to gain a powerful electric charge causing it to deal an extra 4d8+1/Caster Level Lightning damage upon a successful hit.  The strike also roars with thunder that can be heard up to 300 feet away. This spell lasts for concentration up to a minute.

 At Higher Levels:  When you cast this spell using a spell slot of 6 or higher the damage increases by 1d8 for each slot above 5th.