You increase your dexterity or intelligence by 2.

Your Constitution is increased by 1. 

As an undead create you a functionally immortal, you do not age. You also do not require food, water, or breathable air. You are immune to poison and disease. You treat exhaustion as if it is one level less. As such you are counted as an undead creature for all spells and abilities that are affiliated. Also, you do not sleep. Instead you enter a trance like state for 4 hours, functionally acting identical to meditation. 

You can see in dim light within 60 feet of you as if it bright light, and in darkness as if it were dim light. you can't discern colour in darkness, only shades of grey. 

As long as you have your Phylactery on your corpse you can regenerate after death. At 60 seconds after death your phylactery randomly teleports you to an area witch has a determined distance from death based on the roll of a d100(rolled by DM); by the DM's discretion you appear in an area that is near the determined distance from death. If the phylactery is removed from your corpse before the 60 seconds after your death than the phylactery has no affect and you remain deceased. After you have teleported you appear with no belongings other than that of your phylactery and your current HP is 1. You also suffer from 4 levels of exhaustion (This cannot be reduced in any way other than rest). 

Teleportation distance.

01-25: 1 mile from death location.

26-50: 10 miles from death location.

51-75: 100 miles from death location.

76-99: 1,000 miles from death location

100: Anywhere on the material plane. 

As a failed Lich you posses a phylactery that you value more so than your very life; it is the source of your power and immortality. This can take the form of an amulet, a ring, or even a small box containing a piece of parchment. This can also be used as an arcane focus for the Lich. The phylactery has the same physical traits that a normal object of its type would have. However, it is immune to all physical damage. (e.g. temp. change, fire, particularly heavy hammer, etc.). The phylactery can only be destroyed by powerful magic means through that of a specific ritual or a sufficiently powerful spell sent directly at it. The spell should be of a particularly high level to prevent a lvl.1 wizard from simply using a magic missile at the phylactery. If the phylactery is destroyed the Lich must make a DC 16 charisma save or be killed instantly. 

If another creature is in possession of the phylactery, than the Lich must make a charisma save against their own spell DC or follow all commands that the creature gives the Lich for the next 8 hours. This feature can be used every 8 hours. If the Lich gets possession of the phylactery before the 8 hours are up they regain their free will. 

Due to your reliance and exposure to necrotic energy you have developed an innate resistance to necrotic damage and magic.