Chargebolt

You conjure innate energies within you to begin charging a powerful bolt of energy. On your subsequent turns, you can use an action to make a ranged spell attack against a creature within 120 feet, launching a bolt of violent energy towards them. The bolt deals 3d6 lightning damage on a hit, increasing by 1d6 each time you end your turn whilst you still concentrate on the spell, to a maximum of 6d6.

If you lose concentration on the spell as you charge it, you take half the spells damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher the maximum damage the spell can deal increases by 1d6 per spell slot level above 2nd.