Undead

You have become a member of the Undead. Be it through magical means or divine means. This means that unless a healing spell targets undead, you will not be healed. Healing also does not repair your body, but the mending spell will repair it. 

Healing Potions will heal you.

You are immune to Disease, Exhaustion, Necrotic, Poison, and the Poisoned condition.

You are vulnerable to Radiant damage.

Death is no longer a factor of which you need to concern yourself with, unless you are disintegrated. 

In 1d6+2 days you revive with 1 HP.

You do not need to breathe, eat, or sleep. You do not bleed.

You gain Darkvision within 60ft.

You will not age, but will rot. Spells can reverse rot. (I.E. Mending and Gentle Repose)

You are also immune to resurrection magic unless it specifies it reverses Undead. (I.E. True Resurrection)