Murder of Crows
CREATURE 9Variant 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.
A murder of crows can get past most barriers to hound their prey. Simple latches, unsecured chimney flues, loosely shuttered windows, and similar obstacles rarely keep a murder away. A murder of crows automatically bypasses many of these simple obstructions and can attempt a DC 25 Thievery check to get through more complex obstructions (such as closed windows or simple barricades).
The crows' angry pecking deals 2d8 piercing damage to each enemy in the swarm's space (DC 28 basic Reflex). A creature that critically fails its save is Blinded for 1d6 rounds as the crows focus their attacks on the target's vulnerable face.