Immutable Form. The gearkeeper is immune to any spell or effect that would alter its form.
Rapid Shifting. Opportunity attacks made against the gearkeeper have disadvantage.
Whirling Blades. Any creature that starts its turn within 5 feet of the gearkeeper takes 4 (1d8) slashing damage.
Multiattack. The gearkeeper makes two Arm Blade attacks, or one Arm Blade attack and one Spear Launcher attack.
Arm Blade. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit:18 (3d8 + 5) slashing damage.
Spear Launcher. Ranged Weapon Attack: +9 to hit, range 90 ft., one target. Hit:12 (2d6 + 5) piercing damage, and the target is knocked prone.
Shrapnel Blast (Recharge). The gearkeeper jettisons a spray of jagged metal in a 30-foot cone. Each creature in the area must make a DC 15 Dexterity saving throw, taking 21 (6d6) piercing damage on a failed save, or half as much damage on a successful one.
Rolling, deadly whirlwinds of metal plates and curving blades, these clockwork automatons were initially designed by tinkerers and mage engineers to be sentries and guardians in the deepest of vaults during the Age of Arcanum. While most of these majestic and deadly curiosities have fallen to rust and ruin, forgotten along with their long-destroyed and buried societies, some continue to patrol the tunnels and pathways of forgotten tombs and dungeons, following their original operations and…