Necrophage

The practice of necrophagy is similar to that of necromancy—but with a more horrific flavor. Necrophages, sometimes called death eaters, consume the flesh of the recently deceased to steal those creatures’ knowledge and power.

Wizard Speciality

Adherents of this specialty claim that it is the origin of all necromancy magic and necrotic energy. They view the Negative Plane as a cosmic necrophage all its own, devouring all matter, energy, and life and replacing it with necrotic energy and undead.
Except as noted, necrophages function as necromancers and use the wizard spell list. Instead of gaining the corresponding features of the School of Necromancy, a necrophage has the features described below.
 

Undead Familiar

2nd-Level Necrophage Feature
You add the find familiar spell to your spellbook if it’s not already there. When you conjure a familiar, the creature is undead instead of a celestial, fey, or fiend. The familiar gains the following trait.
Undead Fortitude. If damage reduces the familiar to 0 hit points, it makes a Constitution saving throw with a DC equal to 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the familiar drops to 1 hit point instead.
 

Memory of Flesh

6th-Level Necrophage Feature
You can use an action to consume a bit of flesh from an undead or a recently slain (within 1 hour) creature with an Intelligence of 6 or higher. An unwilling target is allowed a DC 14 Constitution saving throw to resist the effect.
If the target is affected, you gain temporary hit points equal to your wizard level, and if the target was proficient in any Intelligence skills, you can pick one of them. You gain proficiency in that skill or, if already proficient, double your normal proficiency bonus when using that skill. The temporary hit points and absorbed skill proficiency last until you finish a long rest.
You can’t target the same creature with this feature twice within 24 hours. If you use the feature on a different creature, the original effect ends.
 

Fruit of the Mind

10th-Level Necrophage Feature
You can use Memory of Flesh to gain information from the creature as if you had cast speak with dead instead of gaining temporary hit points and a skill proficiency. An unwilling target has disadvantage on its saving throw. As with Memory of Flesh, you can’t target the same creature with this feature twice within 24 hours. If you use the feature on a different creature, the original effect ends. A particular creature can be affected by Fruit of the Mind a number of times equal to its Constitution modifier. Beyond that maximum, further attempts to target it yield no results.
 

Feed on Life

14th-Level Necrophage Feature
You gain several benefits after using Memory of Flesh or Fruit of the Mind:

You no longer require air, food, drink, or sleep.

You gain immunity to disease, to being poisoned, and to poison and necrotic damage.

You can’t suffer a reduction in hit point maximum.

These benefits last until you finish a long rest.