Elemental Infusion

You infuse an ally's weapon with the power of the elements. Choose a weapon worn or carried by a friendly creature within range and choose one of the following damage types: acid, cold, fire, lightning, poison, or thunder. Until the spell ends, that weapon's damage type changes from its normal type to the chosen type. The spell ends early if the weapon is held by a hostile creature at the start of your turn or if the weapon is not in the posession of a friendly creature for more than 1 minute.

At Highter Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional weapon for each slot above 1st. All affected weapons are changed to the same damage type.