Rings of Blood Magic

The quest Rings of Blood Magic, is a quest where the Vampire Lord character goes to two random dungeons, such as Halldir's Cairn and Bloodlet Throne, to recover two rings that increase your Vampire Lord, or just overall abilities. The Ring of the Erudite is a ring that boosts your magicka by 100 points and allows your magicka to regenerate faster, the other ring, The Ring of The Beast, gives you a 100 health boost and your claws do 20 additional damage, Khajiit get a x4 bonus to unarmed combat with it equipped. They are normally held by a Master Vampire, in the Boss Chest at the end of the dungeon, or on a human character. You may also get two Night Power Amulets.

Acquisition
It is normally given by Feran Sadri, or possibly by anyone in the Volkihar Court, the resident alchemist of Volkihar Castle once you have succeeded Lord Harkon.