Actions/Abilities/Traits: (Pathfinder 2e)
Ability
Blood Draining Bites
Each enemy in the swarm's space takes 2d6 bleed damage and is exposed to brood leech swarm venom.
Ability
Brood Leech Swarm Venom
10-foot status penalty to Speed (1 round)
Trait
Amphibious
An amphibious creature can breathe in water and in air, even outside of its preferred environment, usually indefinitely but at least for hours. These creatures often have a swim Speed. Their bludgeoning and slashing unarmed Strikes don't take the usual -2 penalty for being underwater.
Trait
Animal
An animal is a creature with a relatively low intelligence. It typically doesn't have an Intelligence ability modifier over -4, can't speak languages, and can't be trained in Intelligence-based skills.
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.
Immunity
precision
swarm mind
Perception
tremorsense 30 feet
Resistance
bludgeoning 2
piercing 5
slashing 5
Weakness
area damage 5
salt 5
splash damage 5