Oath of the Light from the DarkOath Spells:3rd Level: Arms of Hadar, Dissonant Whispers5th Level: Tashas Hideous Laughter, Darkness9th Level: Hunger of Hadar, Spider Climb13th Level: Vampiric Touch, Evards Black Tentacles17th Level: Dream, Flame Strike

Level 3:Strong of SoulYou cannot be turned into a vampire except by choice, and if you are turned, you can never decay past the point of being unfed for 48 hours. However, all of your healing abilities now deal Necrotic Damage instead of healing.Channel Divinity: Sacred WeaponOnce per day, you may imbue one weapon that you own with negative energy. For one minute, you add your Charisma modifier to the attack rolls and damage of all attacks with this weapon. During this time, damage dealt by this weapon is Necrotic.Level 5:Casaubons CharmYou add your proficiency to Persuasion. If you already have Persuasion, you have expertise now. You cannot be charmed.Level 13:You gain Regenerate (10).Level 17:You channel the spirit of Casaubon himself. Once per week, for one minute, you are resistant to non-magical damage, and your Wisdom, Strength, and Dexterity are set at 20. During this time, Spells may be cast without expending spell slots.