Multiattack. The stalker makes two Glaive attacks or two Rock attacks.

Glaive. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 18 (2d10 + 7) slashing damage plus 9 (2d8) force damage.

Rock. Ranged Weapon Attack: +11 to hit, range 60/240 ft., one target. Hit: 23 (3d10 + 7) bludgeoning damage. If the target is a Large or smaller creature, it must succeed on a DC 19 Strength saving throw or have the prone condition. After the stalker throws the rock, roll a d6; on a roll of 3 or lower, the stalker has no more rocks to throw.

Erupting Horns (Recharge 5–6). The stalker causes the earth to churn at a point on the ground it can see within 60 feet of itself. Six horn-shaped stones erupt in a 30-foot-radius, 30-foot-high cylinder centered on that point and then crumble to dust. Each creature in that area must make a DC 15 Dexterity saving throw. On a failed save, a creature takes 33 (6d10) piercing damage and is pushed up to 30 feet upward and then falls. On a successful save, a creature takes half as much damage only.