Enraged Raven SwarmCreature 4
Source Pathfinder Society Scenario #1-05: Trailblazers' Bounty
Perception +10 (low light vision)
Languages none
Skills Acrobatics +12, Athletics +5, Stealth +8
Str +1, Dex +4, Con +2, Int -4, Wis +3, Cha -1
AC 18; Fort +10; Reflex +12; Will +8;
HP 45
Speed 10 feet (fly 40 feet)
Immunities precision, swarm mind
Weaknesses Area Damage 5, Splash Damage 5
Resistances Bludgeoning 7, Piercing 7, Slashing 3
Swarming Claws

Each enemy in the raven swarm's space takes 2d8 piercing damage (DC 21 reflex save). Creatures that fail this save also take 3 bleed damage
damage.
A flock of ravens is known as an unkindness. Certainly the name lives up to its meaning when a swarm of ravens decides to work together. In most cases, a raven swarm like the one presented here won't attack larger foes, but when manipulated by supernatural forces or simple desperation born from hunger, an unkindness of ravens can be a surprisingly dangerous foe.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AnimalAn animal is a creature with a relatively low intelligence. It typically doesn't have an Intelligence attribute modifier over –4, can't speak languages, and can't be trained in Intelligence-based skills.
SwarmA 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 grabbed, prone, and restrained conditions.