Actions/Abilities/Traits: (Pathfinder 2e)
Ability
Hatred for Secret Doors
Cobblebone swarms have a hatred for secret doors, trick drawers, or anything else that conceals hidden spaces, as such things remind them of years or decades spent trapped within stone. They gain a +5 competence bonus to Athletics checks to Force Open secret doors.
Ability
Jutting Bones
The cobblebone swarm's space is difficult terrain.
Ability
Occult Innate Spells
DC 18; Cantrips (2nd) ghost sound
Ability
Phantasmal Pummeling
Each foe in the cobblebone swarm's space takes 1d6 bludgeoning damage and 1d6 negative damage (DC 17 basic Reflex save).
Ability
Settlement Bound
A typical cobblebone swarm must remain in the settlement where it originated and can travel no farther than 1 mile from it without falling apart into component pieces, reviving if its pieces are returned to this area. Occasionally, cobblebone swarms are bound to a specific building, road, or district, rather than a settlement.
Trait
Earth
Effects with the earth trait either manipulate or conjure earth. Those that manipulate earth have no effect in an area without earth. Creatures with this trait consist primarily of earth or have a magical connection to that element. Planes with this trait are mostly solid, with caverns and other hollow pockets.
Trait
Swarm
A swarm is a mass or cloud of creatures that functions as one monster. Its size entry gives the size of the entire mass, though for most swarms the individual creatures that make up that mass are Tiny. A swarm can occupy the same space as other creatures, and must do so in order to use its damaging action. A swarm typically has weakness to effects that deal damage over an area (like area spells and splash weapons). Swarms are immune to the grappled, prone, and restrained conditions.
Trait
Undead
Once living, these creatures were infused after death with negative energy and soul-corrupting evil magic. When reduced to 0 Hit Points, an undead creature is destroyed. Undead creatures are damaged by positive energy, are healed by negative energy, and don't benefit from healing effects.
Immunity
death effects
disease
paralyzed
poison
precision
swarm mind
unconscious
Perception
lifesense 40 feet
Resistance
piercing 5
slashing 5
Weakness
area damage 3
positive 5
splash damage 3