Multiattack

The giant makes two greatclub attacks and a frightful presence attack, or one rock throwing attack.

Greatclub

Melee Weapon Attack: +16 to hit, reach 30 ft., one target. Hit: 55 (10d8 + 10) bludgeoning damage.

Rock

Ranged Weapon Attack: +16 to hit, range 90/240 ft., one target. Hit: 49 (6d12 + 10) bludgeoning damage.

Frightful Presence

Each creature of the giant's choice that is within 120 feet of the giant and aware of it must succeed on a DC 19 Wisdom saving throw or become frightened for 1 minute. A creature repeats the saving throw at the end of each of its turns, ending the effect on itself on a success. Once a creature's saving throw is successful, it is immune to the giant's Frightful Presence for the next 24 hours.