False Appearance: While motionless, the Rocklurker is indistinguishable from an ordinary boulder or large rock.
Camouflage Mastery: The Rocklurker has advantage on Dexterity (Stealth) checks made to hide in rocky or mountainous terrain.
Rock Merge: The Rocklurker can meld with natural stone as if under the meld into stone spell, allowing it to blend into mountain environments and ambush unsuspecting travelers.
Lurking Strike: The first time the Rocklurker moves after staying still for at least 1 hour, it can surprise any creatures that haven’t detected it, making an attack with advantage.
Actions:
Multiattack: The Rocklurker makes two slam attacks.
Slam: Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 2d8+4 bludgeoning damage.
Rockslide Burst (Recharge 5-6): The Rocklurker triggers a small rockslide in a 15-foot radius around it, causing all creatures in the area to make a DC 15 Dexterity saving throw. On a failed save, they take 4d8 bludgeoning damage and are knocked prone. On a successful save, they take half damage and are not knocked prone.