Weaponforce Rush

You touch a melee weapon that deals piercing or slashing damage that is in your possession. It is covered in spiraling bolts of magical energy and begins to glow bright turquiose-blue before streaking forward in a 25-foot long, 5 foot wide line toward one or more targets that you can see. All targets in that line must make a Dexterity saving throw, taking 3d6 + your Wisdom modifier force damage, 1d6 lightning damage, and 3d4 + your proficiency bonus (if you are proficient with the weapon) piercing damage on a failed save, or half as much damage on a success. After the weapon has hit 3 targets, it loses all of its magical power and reverts back into its normal form. However, due to damage from the spell's energy, the weapon now has a -1 penalty to damage until it is fixed by a weaponsmith.