Though at first appearing to be an ordinary suit of armor, this imposing being begins to move, its lumbering movements slow and methodical.
Hollow Helm CR 1
Speed 20 ft., fly 30 ft. (perfect)
Melee 1 slam +4 (1d4+1)
Special Attacks skull cage
A hollow helm can hold itself so still it appears to be a normal suit of armor. A hollow helm that uses freeze can take 20 on its Stealth check to hide in plain sight, disguised as normal armor.
A hollow helm sometimes pretends to be normal armor, letting a creature try to wear it before revealing its deadly nature. If the hollow helm makes a successful combat maneuver to grapple an opponent of Medium size or smaller, the grappled creature is also blinded. Creatures that purposefully try to wear a hollow helm are automatically grappled. This blindness lasts until the hollow helm’s grapple is broken. A hollow helm cannot attack a creature it is grappling. If a hollow helm is damaged while it is grappling, the creature it is grappling takes an equal amount of damage.
Pathfinder 47: Ashes at Dawn.