Elemental Strike

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within range. Choose an element of damage. On a hit, the target suffers the weapon attack’s normal effects and an additional 1d6 damage of the chosen type.

This spell’s damage die increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d8 damage to the target on a hit.  Damage rolls increase to 1d10 at 11th level and again to 1d12 at 17th level.