Key Wish

Rejuvenation. If you have a phylactery, dying gain a new body in 1d10 days, regaining all its hit points and becoming active again. The new body appears within 5 feet of the phylactery.

Legendary Resistance (1/Day). If the phylactery is with 5 feets by you and you fails a saving throw, you can spend your reaction to succeed instead.

Legendary death. You die if the phylactery is leaded to 0 hp.