Thief of Four Fates

You craft a number of talismans symbolic of your power over the undead and give them to your allies to wear. As an action on your turn, you summon forth 4 minor undead spirits that swirl around you for one minute while you hold concentration. When an ally is visible to you, within 30 feet of you, and wearing your talisman, and is hit by an attack that you can see, you may will one of the minor undead spirits forth to reduce the damage taken by your ally by 1d6. Your concentration on this spell fades after one minute or may be dismissed early as a free action, but if concentration on this spell is lost, you take a number of d6 of necrotic damage equal to the number of the summoned minor undead spirits not used to reduce damage.

At Higher Levels: The damage reduction die (and the damage die to the caster) increases to a d8 at 5th level, a d10 at 7th level, and a d12 at 9th level.