Nihili

The dead stare of a nihili makes those around the undead feel like their own lungs are starting to violently collapse, mimicking the nihili’s demise. A living creature that can see and breathe that begins its turn within 15 feet of a nihili must succeed at a Fortitude save or take bludgeoning damage (as ranged energy damage of 2 CRs lower)

A nihili generates a field of gravity that functions in a 5-foot aura around itself (including 5 feet above the nihili), exerting a downward force toward the nihili’s feet. This allows the nihili to function as if constantly under the effect of spider climb. Any creature entering this aura from an area of zero-g must succeed at a Reflex saving throw or be knocked prone.