Lich initiate

You take the first steps toward lichdom, which involve creating your spirit jar, a magical vessel that anchors your soul to the world of the living in the event of your body's destruction.

You gain the following benefits: 

Ability score increase: Increase your Intelligence, Wisdom or Charisma score by 1, to a maximum of 20

Creating your spirit jar: Choose a tiny object of great significance to you. Roll on or choose from the spirit jars table to inspire this object

SPIRIT JARS

 [roll]1d6[/roll] Your spirit jar is... 

1. An acorn from a forest destroyed a long time ago
2. A love letter from a deceased paramour
3. The inkwell that you used to scribe your first spell or prayer
4. The defaced holy symbol of a god you've denounced
5. A bell whose toll becomes lower with each soul you collect 
6. A desiccated body part -such as an eye, finger, or horn - that was once part of you or someone you knew

 Spirit Jar Destruction. Your spirit jar’s Armor Class equals your spell save DC, and it has a number of Hit Points equal to your spellcasting ability modifier plus your character level. If your spirit jar is destroyed, you gain 2 Exhaustion levels, and you can’t use the Soul Siphon ability until you create a new one.

Soul Siphon. When you reduce a Humanoid enemy to 0 Hit Points, you can consume its soul and gain a boost of arcane energy (no action required). On your next turn, the first creature you hit with an attack takes extra Necrotic damage equal to 1d6 plus your spellcasting ability modifier. You also gain this benefit if someone else reduces a Humanoid enemy within 10 feet of you to 0 Hit Points. A soul consumed in this way can be restored only by a True Resurrection or Wish spell.