Elemental Weapon

You touch a weapon and imbue it with elemental energy. Choose one of the following damage types: acid, cold, fire, lightning, or thunder. For the duration, the weapon becomes a magic weapon and has a +1 bonus to attack rolls and deals an extra 1d4 damage of the chosen type when it hits. The bonus to attack rolls can stack with enhancements from magic weapons, to a maximum of +3.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the bonus to attack rolls increases to +2 and the extra damage increases to 2d4. When you use a spell slot of 6th level or higher, the bonus increases to +3 and the extra damage increases to 3d4. When you cast this spell at 8th level or higher, the damage dice increase in size based on the level of the spell used: d6 at 8th level, d8 at 10th level, d10 at 11th level, and d12 at 12th level.