Geist of Jarom

Once a month, a creature possessed, may use their reaction to succeed on a failed Constitution, Wisdom or Charisma saving throw instead. If a possessed creature falls unconscious, Jarom emerges, stabilizes them with a touch, and then quickly returns to the body. If Jarom is in control of a possessed creature, then the creature has immunity to the charmed and frightened conditions and resistance to bludgeoning, piercing and slashing damage from nonmagical attacks.