Wild's Permanent Elemental Weapon

A special spell created by the wizard prodigy, Wild, used to buff his party member's weapons and prep them for any fight. 

A weapon you touch becomes a magic weapon. Choose one of the following damage types: Acid, Cold, Fire, Lightning, or Thunder. The weapon has a permanent +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 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. 

Using this Spell more than once per long rest results in one level of exhaustion being applied to the spell caster.