Thunder Javelin

The caster of the spell summons a javelin made of a bolt of lightning. Then the caster makes a ranged spell attack using their casting modifier to attack. On hit the javelin does 4d6 thunder damage plus the user´s Charisma, Wisdom, or Intelligence bonus to the target of the spell. When this spell is cast using a level 3 or higher spell slot, deal an additional 1d6 thunder damage to the target hit with this spell for each level after 2.