Lich Initiate

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. You spend a Long Rest anchoring your soul to this object, allowing you to consume the life force of the living to bolster your own power. You can have only one spirit jar at a time. If you create a second spirit jar, the old one is destroyed.

SPIRIT JARS 1d6 Your Spirit Jar Is …
1 An acorn from a forest destroyed long 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 Life Siphon ability until you create a new one. 

Life Siphon. When a creature within 10 feet of you, other than a Construct or an Undead, is reduced to 0 Hit Points, you can consume a portion of its escaping life essence 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.