Crystalline Edge

The blade or bludgeoning end of a weapon that you becomes imbued with magical as it is wreathed in razor-sharp crystal. For the duration, the weapon is considered magical and you may use your spellcasting ability instead of strength or dexterity for attack and damage rolls of melee attacks using that weapon.

On a hit the weapon deals an extra 1d6 slashing damage.

At 5th level this spell grows to 2d6 and at 10th level it grows to a 3d6.