Eldritch Life

You feel the protection of your patron flow over you. You gain 1d10 + charisma modifier + proficiency bonus temporary hit points for 1 minute. If you still have temporary hit point granted by this spell when it ends, you take necrotic damage equal to those remaining temporary hit points. 

This spell increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).