Rug Rats

Created by a mage who once sought world dominance through sales of a specially-tainted rug, rug rats are now relatively common in most lands.

Rug Rats
Size/Type: Tiny Magical Beast(Swarm)
Hit Dice: 8d8 (26 hp)
Initiative: +4
Speed: 20 ft. (4 squares), climb 20 ft.
Armor Class: 16 (+2 size, +4 Dex), touch 16, flat-footed 12
Base Attack/Grapple: +3/—
Attack: Swarm (1d6 plus disease)
Full Attack: Swarm (1d6 plus disease)
Space/Reach: 5 ft./0 ft.
Special Attacks: Disease, distraction
Special Qualities: Half damage from slashing and piercing, low-light vision, scent, swarm traits, meld with fabric
Saves: Fort +4, Ref +9, Will +6
Abilities: Str 2, Dex 18, Con 10, Int 2, Wis 16, Cha 2
Skills: Balance +16, Climb +16, Hide +16 +18, Listen +8, Move Silently +10, Spot +8, Swim +8
Feats: Alertness, Stealthy, Weapon FinesseB
Environment: Any
Organization: Pack (2–4 swarms), or infestation (7–12 swarms)
Challenge Rating: 4
Treasure: None
Alignment: Always neutral
Advancement: None
Level Adjustment: —

Combat

Rug rats seek to climb up from the rug they’re in and attack any warm-blooded prey they encounter. A rug rat swarm deals 1d6 points of damage to any creature whose space it occupies at the end of its move, 2d6 if they stand upon the rug they inhabit.

Disease (Ex): Filth fever—swarm attack, Fortitude DC 14, incubation period 1d3 days, damage 1d3 Dex and 1d3 Con. The save DC is Constitution-based.

Distraction (Ex): Any living creature that begins its turn with a rug rat swarm in its square must succeed on a DC 14 Fortitude save or be nauseated for 1 round. The save DC is Constitution-based.

Meld with Fabric (Su): A rug rat swam can meld with the rug it inhabits. This makes them unable to be attacked, though the rug can still be destroyed. If the rug is destroyed, they immediately meld back into their rat forms and scatter, at which point they are treated as normal rats.

Skills: A rug rat swarm has a +4 racial bonus on Hide and Move Silently checks, and a +8 racial bonus on Balance, Climb, and Swim checks. A rug rat swarm can always choose to take 10 on all Climb checks, even if rushed or threatened. A rug rat swarm uses its Dexterity modifier instead of its Strength modifier for Climb and Swim checks. A rug rat swarm has a +8 racial bonus on any Swim check to perform some special action or avoid a hazard.


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Shadow Swarm

Swarm of shadows that attack creatures standing in shadows like piranhas, devouring their flesh wish a massive number of attacks. Creatures which move out of the shadows cannot be attacked by these swarms.

Shadow Swarm
Size/Type: Large Undead Swarm (Incorporeal)
Hit Dice: 7d12 (56 hp)
Initiative: +2
Speed: 0 ft. Travel only by shadows (see Shadow Jump text below)
Armor Class: 16 (+3 dex, +2 deflection), touch 14, flat-footed 12
Base Attack/Grapple: +4/—
Attack: Incorporeal touch +6 melee (1d4 Str)
Full Attack: 4 attacks/round Incorporeal touch +6 melee (1d4 Str)
Space/Reach: 10 ft./5 ft.
Special Attacks: Create spawn, strength damage
Special Qualities: Darkvision 60 ft., incorporeal traits, +2 turn resistance, undead traits
Saves: Fort +3, Ref +5, Will +6
Abilities: Str Ø, Dex 16, Con Ø, Int 6, Wis 10, Cha 14
Skills: Hide +14*, Listen +7, Search +5, Spot +13
Feats: Alertness, Dodge, Mobility, Spring Attack
Environment: Any
Organization: Swarm (8-12 per swarm)
Challenge Rating: 8
Treasure: None
Alignment: Always chaotic evil
Advancement: 8-12 HD (Huge), 13-17 HD ()
Level Adjustment: —

A shadow swarm can be difficult to see in dark or gloomy areas but stands out starkly in brightly illuminated places.

A shadow swarm is a group of 8-10 weightless shadows 4 to 5 feet tall. Shadows cannot speak intelligibly, but emit high-pitched shrieks when they fly in swarms.

Combat

Shadows hunt in the night sky, traveling great distances.

Strength Damage (Su): The touch of a shadow swarm deals 1d4 points of Strength damage to a living foe. A creature reduced to Strength 0 by a shadow swarm dies. This is a negative energy effect.

Create Spawn (Su): Any humanoid reduced to Strength 0 by a shadow swarm becomes a shadow and joins the swarm within 1d4 rounds.

Shadow Jump (Su): A shadow swarm has the ability to travel between shadows as if by means of a dimension door spell. The limitation is that the magical transport must begin and end in an area with at least some shadow. A shadow swarm can jump up to a total of 20 feet each round in this way; this may be a single jump of 20 feet or two jumps of 10 feet each. Every two HD higher than 7, the distance a shadow swarm can jump each round doubles (40 feet at 9, 80 feet at 11, and 160 feet at 13). This amount can be split among many jumps, but each one, no matter how small, counts as a 10-foot increment.

Skills

Shadow swarms have a +2 racial bonus on Listen and Spot checks and a +4 racial bonus on Search checks. *A shadow swarm gains a +4 racial bonus on Hide checks in areas of shadowy illumination. In brightly lit areas, it takes a -4 penalty on Hide checks.


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Birdswarm

Hundreds of birds of all types gather in a cloud above.

Birdswarm
Tiny Animal (Swarm)
Hit Dice: 3d8 (12 hit points)
Initiative: +1 (Dex)
Speed: 10 ft, Fly 60 ft (average)
Armor Class: 13 (+2 size, +1 Dex)
Single Attack: swarm (1d4)
Full Attack: swarm (1d4)
Space/Reach: 10 ft/0 ft
Special Attacks: Fly-by-attack
Special Qualities: None
Saves: Fort +x, Ref +x, Will +x
Abilities: Str 1, Dex 13, Con 10, Int 2, Wis 14, Cha 6
Skills: Listen +6 (2), Spot +9 (5)
Feats: Alertness, Weapon Finesse
Climate/Terrain: Temperate/Any (including urban)
Organization: Flock (1-4 swarms)
Challenge Rating: 2
Treasure: Half standard (very small items only)
Alignment: Always Neutral
Advancement: –

COMBAT
A birdswarm does not always act as a coherent unit. Many birds will attack, while others will simply squawk at their prey. They are treacherous in that they are so unpredictable, often going from harmless to harmful in a single round. Because of this, unless characters watch them closely, birdswarms will often surprise them when they attack.

Distraction (Ex): Any living creature that begins its turn with a swarm in its square must succeed on a DC 12 Fortitude save or be confused for 1 round. The save DC is Constitution-based.

Fly-by-attack (Ex): A birdswarm can attack prey and keep moving in the same round.


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Swarm of Giant Locusts

Size/Type: Small Vermin (Swarm)
Hit Dice: 15d8+6 (100 hp)
Initiative: +4
Speed: 10 ft. (2 squares), fly 60 ft. (12 squares)
Armor Class: 18 (+4 size, +4 Dex), touch 18, flat-footed 14
Base Attack/Grapple: +4/—
Attack: Swarm (6d6)
Full Attack: Swarm (6d6)
Space/Reach: 30 ft./0 ft.
Special Attacks: Distraction, knockdown
Special Qualities: Darkvision 60 ft., immune to weapon damage, swarm traits, vermin traits
Saves: Fort +4, Ref +6, Will +2
Abilities: Str 1, Dex 19, Con 8, Int Ø, Wis 10, Cha 2
Skills: Listen +4, Spot +4
Feats: —
Environment: Temperate plains
Organization: Cloud (10-15 swarms), or plague (16-30 swarms)
Challenge Rating: 12
Treasure: None
Alignment: Always neutral
Advancement: None
Level Adjustment: —

A locust swarm is a cloud of thousands of winged vermin that devours any organic material in its path, including leather, clothing, foliage, and flesh.

Combat

A giant locust swarm surrounds and attacks any living prey it encounters. A swarm deals 6d6 points of damage to any creature whose space it occupies at the end of its move.

Distraction (Ex)

Any living creature that begins its turn with a locust swarm in its space must succeed on a DC 18 Fortitude save or be nauseated for 1d4 rounds. The save DC is Constitution-based.

Knockdown (Ex)

Any creature that begins it’s turn with a locust swarm in its space must succeed on a DC 14 strength check or be knocked prone by the impact of the enormous insects.

Skills

A locust swarm has a +4 racial bonus on Listen and Spot checks.


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Creature: Flock of Ravens (CR 2)

Flock of Ravens (CR 2)
neutral
Diminutive Animal (Swarm)
Init: +2 Senses: normal
Listen +11 Spot +11

AC: 16 (+4 size, +2 dex)
HP: 13 (HD 3d8)
Resist: half damage from slashing and piercing
Fort: +3 Ref: +7 Will: +3
Weakness: swarm weaknesses

MV: 20 ft. or fly 60 (good)
Attack: Swarm (1d6)
Space / Reach: 10 ft / 0 ft
Base Attack: +2 Grapple: NA

Abilities: Str: 3 Dex: 15 Con: 10 Int: 2 Wis: 14 Cha: 4
SQ: half damage from slashing and piercing, low-light vision, swarm traits
SA: destraction, blinding
Feats: Alertness, Lightning Reflexes
Skills: listen +11, spot +11

A shreiking mass of black feathers, beaks, eyes and claws sweeps through the air.

Normally unagressive, magic or supernatural circumstances sometimes cause these flocks of birds to become extremely agressive and dangerous.

Combat
A raven swarm seeks to surround and attack any prey it encounters. The swarm deals 1d6 points of damage to any creature whose space it occupies at the end of its move.
Distraction (Ex): Any living creature that begins its turn with a swarm in its space must succeed on a DC 11 Fortitude save or be nauseated for 1 round. The save DC is Constitution-based.
Blinding (Ex): Any living creature damaged by a raven swarm may be permamently blinded unless they succeed at a DC 11 Fortitude save.

SWARM COMBAT
In order to attack, a single swarm moves into opponents’ spaces, which provokes an attack of opportunity. It can occupy the same space as a creature of any size, since it crawls all over its prey, but remains a creature with a 10-foot space. Swarms never make attacks of opportunity, but they can provoke attacks of opportunity.
Unlike other creatures with a 10-foot space, a swarm is shapeable. It can occupy any four contiguous squares, and it can squeeze through any space large enough to contain one of its component creatures.
Vulnerabilities of Swarms
Swarms are extremely difficult to fight with physical attacks. However, they have a few special vulnerabilities,
as follows:
A lit torch swung as an improvised weapon deals 1d3 points of fire damage per hit.
A weapon with a special ability such as flaming or frost deals its full energy damage with each hit, even if the weapon’s normal damage can’t affect the swarm.
A lit lantern can be used as a thrown weapon, dealing 1d4 points of fire damage to all creatures in squares adjacent to where it breaks.


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Creature: The Cats of Ulthar

Cats of Ulthar

Hit Dice: 4d8 (18)
Initiative: +3
Speed: 30 ft
Armor Class: 14 (+2 size +2 dex)
Base Attack/Grapple: +3 / –
Attack: Swarm 1d6+1
Full Attack: Swarm 1d6+1
Space/Reach: 10ft / 0ft
Special Attacks: Distraction, stunning aura
Special Qualities: Swarm traits, low-light vision, scent
Saves: Fort +4, Ref +6, Will +2
Abilities: Str 4, Dex 15, Con 10, Int 10, Wis 12, Cha 16
Skills: Balance +10, Climb +6, Hide +14, Jump +10, Listen +3, Move Silently +6, Spot +3.
Feats: Weapon Finesse, Improved Initiative
Environment: Temperate and lunar planes
Organization: Solitary, pride (2-6 swarms), or hunting party (7-12 swarms)
Treasure: None
Alignment: Neutral with lawful and good tendencies
Advancement: None
Level Adjustment: —

Thousands of yellow cat eyes blink at you malevolently and a paralytic fear grips you. No sound comes from the horde of felines as they pounce upon and completely envelop you.

These creatures are indistinguishable from normal domestic felines. However, they are highly intelligent, well organized, magical beasts. Any mistreatment of the feline race incurs their vengeance. Once they learn of a crime, they gather under the light of the moon in sufficient numbers to dispatch the transgressor without warning. They are chillingly efficient, leaving behind no trace of their victims.

COMBAT

Stunning Aura (Su): Any living creature within 10′ of the swarm of Cats of Ulthar must make a DC 15 Will save or be stunned for 1 round. A potentially affected creature that succeeds on its Will save remains immune to the cats’ stunning presence for 24 hours.

Distraction (Ex): Any living creature that begins its turn with a swarm in its square must succeed on a DC 15 Will save or be shaken (-2 to attacks, saves, skill and ability checks) for one round.

Skills: Cats have a +4 racial bonus on Climb, Hide, and Move Silently checks and a +8 racial bonus on Jump checks. Cats of Ulthar also receive a plus one million racial bonus on Jump checks when they leap from rooftops to the dark side of the moon.


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