Multiattack

The mummy uses Dreadful Glare and then attacks with its rotting fist.

Dreadful Glare (Gaze)

The mummy targets a creature within 60 feet. The target makes a DC 11 Wisdom saving throw. On a failure it is magically frightened until the end of the mummys next turn. If the target fails the save by 5 or more it is paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of mummies (but not mummy lords) for 24 hours.

Rotting Fist

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage plus 10 (3d6) necrotic damage. If the target is a creature it makes a DC 13 Constitution saving throw. On a failure it is cursed with Mummy Rot.