Creature Type: Undead

The Grave Touched Feature from the Warlock Undead (or other similar ability) is even more pronounced on those characters that are already approaching the line between living and dead. When a Reborn reaches 6th lvl Warlock they become Undead.

Damage Vulnerabilities: Fire
Damage Resistances: Bludgeoning, Piercing, and Slashing from Nonmagical Attacks, Necrotic
Damage Immunities: Poison (and Necrotic in Form of Dread)
Condition Immunities: Charmed, Exhaustion, Frightened, Paralyzed, Poisoned

Healing Penalty:

• Immunity: Cure wounds and similar don't help undead as its stated
• Poisoned healing potions (Add basic poison or similar as a special ingredient)
• Regen spells, rings, and stuff should still work…

Other Items:

• cannot die from old age and you do not require air, food or drink.