Fiendish Flock
CREATURE 7Variant raven swarm
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.
Few birds are as cunning and social as the raven.
This monster doesn't have a single mind (typically because it's a swarm of smaller creatures), and is immune to mental effects that target only a specific number of creatures. It is still subject to mental effects that affect all creatures in an area.
The fiendish flock's angry pecking and clawing deals 2d6 piercing plus 2d6 slashing damage to each enemy in the swarm's space (DC 25 basic Reflex save). A creature that critically fails its save is Blinded for 1d4 rounds as the birds focus their attacks on the target's face.