Voltaic Tear

An Electrifying outline of a Blue Dragon Surrounds you as you cast this spell. Black lightning charges at your Draconic Feet and slowly climbs up your mouth before shooting out in a blitz of pure silence until it reaches its target. A loud thunderous boom echoes out after penetrating its target. The creature makes a Dexterity saving throw. If the creature is immune to lightning damage they instead take half damage, If a target is resistant to lightning damage, they take normal damage, or if the target would take normal damage from lightning they are instead vulnerable to lightning damage. The creature takes 5d10 lightning damage on a failed save becomes resistant to lightning damage if they are immune to lightning damage, lose resistance to lightning if they have it, or are vulnerable to lightning damage for the next minute, or half as much damage on a successful one and maintain your resistance/immunities to lightning damage. The lightning ignites all flammable objects in its path that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the damage increases by 2d10 for each slot level above 7th.