Crawling Hand Swarm

Tremorsense allows a monster to feel the vibrations through a solid surface caused by movement. It is an imprecise sense with a limited range (listed in the ability). Tremorsense functions only if the monster is on the same surface as the subject, and only if the subject is moving along (or burrowing through) the surface.

Lifesense allows a monster to sense the vital essence of living and undead creatures within the listed range. The sense can distinguish between the vitality energy animating living creatures and the void energy animating undead creatures, much as sight distinguishes colors.

Trigger A creature in the swarm's space attempts to Cast a Spell with a verbal component or attempts an action with the linguistic or vocal traits Effect The swarming hands clamp over the triggering creature's mouth, preventing it from vocalizing. The affected creature must succeed at a DC 22 reflex save or the triggering action is disrupted.

A creature with void healing draws health from void energy rather than vitality energy. It is damaged by vitality damage and is not healed by vitality healing effects. It does not take void damage, and it is healed by void effects that heal undead.

Each enemy in the swarm's space takes 3d6 slashing damage (DC 20 reflex). A creature that fails its save against Pummeling Grasp is also knocked Prone.