Actions/Abilities/Traits: (Pathfinder 2e)
Ability
Boneshard Burst
When a feral skull swarm is reduced to 0 Hit Points, it erupts in an explosion of foul energy and bone fragments in a 30-foot burst, dealing 3d12 piercing damage and 2d12 negative damage (DC 32 basic Reflex save).
Ability
Feral Gnaw
Each enemy in the swarm's space takes 2d6 bludgeoning, 2d6 piercing, and 2d6 slashing damage (DC 32 basic Reflex save). A creature that fails its saving throw also takes 1d10 persistent bleed damage.
Ability
Feral Trackers
A feral skull swarm gains a +2 circumstance bonus to Perception checks to Seek and to Survival checks to Track, both against any creature that has taken damage from the swarm's Feral Gnaw within the previous 24 hours.
Ability
Frightening Howl
(auditory, emotion, enchantment, fear, mental) The feral skull swarm emits a terrifying howl. Each creature within 60 feet must succeed at a DC 32 Will save or become frightened 2 (frightened 3 and fleeing for 1 round on a critical failure). Whether it succeeds or fails its save, a creature is temporarily immune to Frightening Howl for 24 hours.
Trait
Mindless
A mindless creature has either programmed or rudimentary mental attributes. Most, if not all, of their mental ability modifiers are -5. They are immune to all mental effects.
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
mental
paralyzed
poison
precision
unconscious
Perception
darkvision
scent (imprecise) 30 feet
Resistance
bludgeoning 5
cold 10
electricity 10
fire 10
piercing 10
slashing 10
Weakness
area damage 10
splash damage 10