You can cast the hex spell once with this trait and regain the ability to do so when you finish a long rest. When you reach 3rd level, you can cast the find steed spell once with this trait and regain the ability to do so when you finish a long rest. Wisdom is your spellcasting ability for these spells. You can also cast these spells using any spell slots you have. 

(I don't own any books with the hex spell so I linked hunter's mark instead. Just treat it as if it is the hex spell). 

Vulnerability to damage from weapon attacks made with gold weapons. In addition, whenever you start your turn and are holding a golden item you must make a DC 15 CON save or be forced to drop the item.

You can safely remove your head from your body and hold it with your hand or otherwise store it anywhere. If your head is not within 5 feet of your body it has disadvantage on attack rolls and ability checks, and if your body is out of sight of your head it is considered blind and deafened and you can only sense things around your head. Your body and head share the same hit points and death saving throws and your head has 1 Strength, 1 Dexterity, 8 Constitution, 10 AC, and a movement speed of 0 feet. Your body can sense the general location of your head as long as they are within one mile of each other.

Whenever you kill a humanoid or as an action within one minute of a humanoid's death you may choose to rip out their spine and wield it as a weapon. It counts as a natural weapon you are proficient with that has the finesse and reach properties and deals 1d4 + STR slashing damage on a hit. The humanoid must be within 5ft of you in order to rip out its spine. 

Your base walking speed is 30 feet.

Two different ability scores of your choice are increased by 1. 

Your character can speak, read, and write Common and Sylvan.

Every creature in D&D, including every player character, has a special tag in the rules that identifies the type of creature they are. Most player characters are of the Humanoid type. A race option presented here tells you what your character’s creature type is.

Your creature type is undead and fey rather than humanoid. Any feature or spell that would affect one of your creature types affects you. 

Your size is Medium.

You can see in dim light within 60 feet of you as if it were bright light and in darkness as if it were dim light.

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

• You have advantage on saving throws against disease and being poisoned, and you have resistance to poison damage.
• You have advantage on death saving throws.
• You don’t need to eat, drink, or breathe.
• 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.