Elemental Weapon

Source: Player's Handbook (2024)

3rd Level Transmutation (Artificer, Druid, Paladin, Ranger)

Casting Time: Action Range: Touch Components: V, S Duration: Concentration, up to 1 hour

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.