The amount of Damage a swarm deals is based on its Hit Dice, as shown below. A swarm's statistics block has “swarm” in the Melee entry, with no Attack Bonus given. Swarm attacks are not subject to a miss chance for Concealment or cover. Instead, they deal automatic Damage to any Creature whose space they occupy at the end of their move, with no Attack Roll needed. Swarm Attack: Creatures with the swarm subtype don't make standard melee attacks. A swarm rendered unconscious by means of nonlethal Damage becomes disorganized and dispersed, and does not reform until its Hit Points exceed its nonlethal Damage. For purposes of determining the effects of wind on a swarm, treat the swarm as a Creature of the same size as its constituent creatures. Swarms made up of Diminutive or Fine creatures are susceptible to high winds, such as those created by a Gust of Windspell. A swarm takes half again as much Damage (+50%) from Spells or effects that affect an area, such as splash Weapons and many Evocation Spells.
Also, they cannot be tripped, grappled, or bull rushed, and they cannot Grapple an opponent.Ī swarm is immune to any spell or effect that targets a specific number of creatures (including single-target Spells such as Disintegrate), with the exception of mind-affecting effects (charms, compulsions, morale effects, patterns, and phantasms) if the swarm has an Intelligence score and a hive mind. Swarms are never staggered or reduced to a dying state by Damage. Reducing a swarm to 0 Hit Points or less causes it to break up, though Damage taken until that point does not degrade its ability to attack or resist attack. A swarm composed of Fine or Diminutive creatures is immune to all weapon Damage. A swarm made up of Tiny creatures takes half Damage from slashing and piercing Weapons. Swarm Traits: A swarm has no clear front or back and no discernable anatomy, so it is not subject to critical hits or Flanking.
The area occupied by a large swarm is completely shapeable, though the swarm usually remains in contiguous squares. Larger swarms are represented by multiples of single swarms. Swarms of nonflying creatures include many more creatures than could normally fit in a 10-foot square based on their normal space, because creatures in a swarm are packed tightly together and generally crawl over each other and their prey when moving or attacking. A swarm of Fine creatures consists of 10,000 creatures, whether they are flying or not. A swarm of Diminutive creatures consists of 1,500 nonflying creatures or 5,000 flying creatures. A swarm can move through cracks or holes large enough for its component creatures.Ī swarm of Tiny creatures consists of 300 nonflying creatures or 1,000 flying creatures. A swarm can move through squares occupied by enemies and vice versa without impediment, although the swarm provokes an attack of opportunity if it does so. It can occupy the same space as a Creature of any size, since it crawls all over its prey. In order to attack, it moves into an opponent's space, which provokes an attack of opportunity. A single swarm occupies a square (if it is made up of nonflying creatures) or a cube (of flying creatures) 10 feet on a side, but its reach is 0 feet, like its component creatures. A swarm makes Saving Throws as a single Creature. A swarm has a single pool of Hit Dice and Hit Points, a single Initiative modifier, a single speed, and a single Armor Class. A swarm has the characteristics of its type, except as noted here. A swarm is a collection of Fine, Diminutive, or Tiny creatures that acts as a single Creature.