Sword Lightning

A grey cloud surrounds the player who casted it (2 feet tall and 10 feet in diameter). It hits his Melee weapon with a bolt of lightning. This spell fails if the Spellcaster doesn't have a melee weapon in his hand or the spellcaster tries to give the bonus to a ranged weapon.

When you cast the spell, choose a weapon in your hand that you want to get the bonus. (Note; If you can dual wield with hand axes for example only 1 of them gets the bonus). This electrifies the weapon giving a bonus of 2d6 to damage for that weapon. 

If the entity damaged is wet then it add another 1d6 of damage.

At Higher Levels. When you cast this spell using a spell slot of 4th or higher level, the damage increases by 1d6 for each slot level above 3rd.