Stone Camouflage. The giant has advantage on Dexterity (Stealth) checks made to hide in rocky terrain.

Olach Morrah. The giant meditates for 1 hour, during which time it can do nothing else. At the end of the hour, provided the giant's meditation has been uninterrupted, it becomes petrified for 8 hours. At the end of this time, the giant is no longer petrified and gains tremorsense out to a range of 30 feet, as well as a measure of innate spellcasting ability for the next 24 hours.

Innate Spellcasting. The giant's innate spellcasting ability is Wisdom. It can innately cast the following spells, requiring no material components:

1/day each: stoneskin, time stop

3/day each: meld into stone, stone shape

Fling. The giant tries to throw a Small or Medium creature within 10 feet of it. The target must succeed on a DC 17 Dexterity saving throw or be hurled up to 60 feet horizontally in a direction of the giant's choice. and land prone, taking 1d6 bludgeoning damage for every 10 feet it was thrown.

Rolling Rock. The giant sends a rock tumbling along the ground in a 30-foot line that is 5 feet wide. Each creature in that line must make a DC 17 Dexterity saving throw, taking 22 (3d10 + 6) bludgeoning damage and falling prone on a failed save

Multiattack. The giant makes two adamantine greatclub attacks.

Greatclub. Melee Weapon Attack: +9 to hit, reach 15 ft., one target. Hit:19 (3d8 + 6) bludgeoning damage.

Rock. Ranged Weapon Attack: +9 to hit, range 60/240 ft., one target. Hit:28 (4d10 + 6) bludgeoning damage. If the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.

Rock Catching. If a rock or similar object is hurled at the giant, the giant can, with a successful DC 10 Dexterity saving throw, catch the missile and take no bludgeoning damage from it.