You have two creature types: humanoid and undead. You can be affected by a game effect if it works on either of your creature types.

You have advantage against turning and other anti-undead effects. Additionally, if something affects both living and undead creatures, make a Wisdom or Charisma saving throw (your choice) against the effect's DC; if you succeed, you may choose whether it affects you as living or undead. (On a failure, it affects you as the caster intended.)

 Your undead nature is easily apparent to anyone looking at you, unless you are trying to disguise yourself. You have disadvantage on Deception (Wisdom) checks when trying to hide your physical appearance. When not trying to disguise your nature, you have advantage on Intimidation (Charisma) checks. 

You temporarily remember glimpses of the past, perhaps faded memories from ages ago or a previous life. When you make an ability check that uses a skill, you can roll a d6 immediately after seeing the number on the d20 and add the number on the d6 to the check. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

You have escaped death, a fact represented by the following benefits:

Undead Nature. Your undead nature grants you a number of benefits and drawbacks:

• You have advantage on saving throws against disease, poisoned, being, frightened .
• You have resistance to poison, necrotic.
• You have advantage on death saving throws.
• You don’t need to breathe, eat, or drink.
• You don’t need to sleep, and magic can’t put you to sleep. You can finish a long rest in 4 hours if you spend those hours in an inactive, motionless state, during which you retain consciousness. You do not dream in this state; you are fully aware of your surroundings and notice approaching enemies and other events as normal.