Elemental Weapon

A nonmagical weapon you touch becomes a magic weapon. Choose one of the following damage types: Acid, Cold, Fire, Lightning, or Thunder. For the duration, the weapon has a +1 bonus to attack rolls and deals an extra 1d4 damage of the chosen type when it hits.

Using a Higher-Level Spell Slot

If you use a level 5-6 spell slot, the bonus to attack rolls increases to +2, and the extra damage increases to 2d4. If you use a level 7+ spell slot, the bonus increases to +3, and the extra damage increases to 3d4.