Pack of the Soul

Making a Pack with a demon or a death god. You vow your soul to them in exchange of having the power of a lich. 

-Rejuvenation. If it has a soul bound item, 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 soul bound item.

-Frightening Gaze . 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 round in combat. 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 round in combat.

-Condition Immunities-frightened, poisoned 

-Resistance- Necrotic damage