Oops I am a Lich Now

Well, it looks like you're a lich now, but hey you get some powers now. 

At level 0 you gain: 

• Being undead, normal means of healing don't help you anymore, in fact, they damage you.
• Other than your body rotting a bit you don't age so you can't die from old age.
• You no longer need to sleep.
• Damage Immunities: Necrotic
• Necrotic damage heals you. 
• Need to consume souls to feed your phylactery. Each day your phylactery goes down by 2 soul points.
• Phylactery holds up to 10 soul points. 
  • Depending on the creature whose soul you take you gain different amounts of soul points. (DM dependent)
  • EX: A rat could fill it by one point, A level 0 town NPC could fill it by 5, and Your fellow party member by 10. Depends on the DM how many points a creature's soul is.
  • You consume the soul of a creature if you kill it or you can try to forcefully take it: 
    • Fails if the creature is above half its HP and you take 1d6 damage.
    • If the creature is below half its HP it must succeed in a DC 15 CON save with avanage. If it succeeds you take 1d6 damage. 
    • If the creature is at 0 hp it auto fails and you take its soul killing it. 

• Rejuvenation. It Costs 5 soul points. If it has a phylactery, a destroyed lich gains a new body in 1d10 days, regaining all its hit points and becoming active again. The new body appears within 5 feet of the phylactery. However, if its phylactery lacks the soul points needed, then it does not work.
• Long Rest (Once every 12 hours, Costs one soul point) Take the effects of a long rest.

If your Phylactery drops to 0 soul points you have 1 hour to fill it with a point or you DIE. 

At level 5 you gain: 

• Create Undead. Costs 2 soul points. The undead creature is under your control for as long as either you keep it or until it is defeated. (MAX OF 3 CREATURES)
• Phylactery holds up to 15 soul points. 
• Damage Immunities Poison

At level 10 you gain: 

• Phylactery holds up to 20 soul points.
• Action Surge (3 soul points).  Takes one additional action. 

At level 15 you gain: 

• Phylactery holds up to 25 soul points. 
• Phylactery now goes down by 1 soul point a day.
• You can now have up to 6 creatures under your command that you make with the Create Undead spell. 
• Senses Truesight 120 ft.
• Indomitable (3 soul points). Can reroll a saving throw that it has failed. If it does so, it must use the new roll.

At level 20 you gain: 

• Phylactery holds up to 30 soul points. 
•  You can now have up to 12 creatures under your command that you make with the Create Undead spell. 
• Legendary Actions: The lich can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The lich regains spent legendary actions at the start of its turn. 
  • Cantrip. The lich casts a cantrip.
  • Frightening Gaze (Costs 2 Actions). The lich fixes its gaze on one creature it can see within 10 feet of it. The target must succeed on a DC 18 Wisdom saving throw against this magic or become frightened for 1 minute. The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to the lich’s gaze for the next 24 hours.
•  Legendary Resistance (2/Day, Costs 5 soul points). If the Lich fails a saving throw, it can choose to succeed instead.