Boon of Shadow Mastery

You have immunity to necrotic damage. As a bonus action, you can unleash three winding bolts of darkness that have a range of 120 feet. Make an attack roll for each bolt, which uses your Charisma modifier. Each bolt deals necrotic damage equal to 6d6 + your Charisma modifier to its target. The bolts all strike simultaneously.

You can use this boon up to three times, you regain all expended uses after you finish a short or long rest.