Chaos Fang

The metal of a weapon you are holding is imbued with elemental power. For the duration, you can replace bludgeoning, piercing or slashing instead choosing fire, acid, poison, cold or lighting for the damage rolls of melee attacks using that weapon. In addition, the damage die for the weapon changes to 2d4 or 2d6 if it has the two-handed property. The weapon also becomes magical, if it isn't already. The spell ends if you cast it again or if you let go of the weapon.