Multiattack

The giant makes two attacks with its spiked fists. If both attacks hit a Large or smaller target, the target must succeed on a DC 15 Strength saving throw or take 7 (2d6) piercing damage as the giant impales the target on its body spikes.

Spiked Fist

Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 14 (2d8 + 5) piercing damage. If the target is a Large or smaller creature, it is grappled (escape DC 16). The phase giant has two fists, each of which can grapple only one target.

Rock

Ranged Weapon Attack: +8 to hit, range 60/240 ft., one target. Hit: 21 (3d10 + 5) bludgeoning damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked prone.