False Appearance. While the galeb duhr remains motionless, it is indistinguishable from a normal boulder.
Rolling Charge. If the galeb duhr rolls at least 20 feet straight toward a target and then hits it with a slam attack on the same turn, the target takes an extra 7 (2d6) bludgeoning damage. If the target is a creature, it must succeed on a DC 16 Strength saving throw or be knocked prone.
Slam. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit:12 (2d6 + 5) bludgeoning damage.
Animate Boulders (1/Day). The galeb duhr magically animates up to two boulders it can see within 60 feet of it. A boulder has statistics like those of a galeb duhr, except it has Intelligence 1 and Charisma 1, it can't be charmed or frightened, and it lacks this action option. A boulder remains animated as long as the galeb duhr maintains concentration, up to 1 minute (as if concentrating on a spell).
The galeb duhr is a boulder-like creature with stumpy appendages that act as arms and legs. It has the ability to animate the rocks and boulders around it, and is thus usually encountered in rocky terrain.