Multiattack. Makes two Rotting Fist attacks and uses Dreadful Glare.
Rotting Fist. A creature hit is cursed: it can't regain Hit Points, and its Hit Point maximum drops by 10 (3d6) every 24 hours until the curse is removed. A creature this attack drops to 0 Hit Points dies and crumbles to dust.
Dreadful Glare.DC 11 Wis save by a creature within 60 ft or Frightened until the end of the mummy's next turn.