Path of the Lich: Transfer Life (Intelligence) (UA)

You gain the following benefits.

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

Soul Transference. When you use Soul Siphon to consume a soul, you can choose a creature within 60 feet of yourself to gain Temporary Hit Points equal to your Proficiency Bonus plus your spellcasting ability modifier (minimum of 1 Temporary Hit Point.