Swarm of Ravens is a Medium swarm of tiny beasts with unaligned alignment and Challenge Rating 1/4 in the 2024 SRD. This stat block includes AC 12, 11 hit points, speeds, traits, and actions.
Beaks - Melee Attack Roll: +4, reach 5 ft. Hit: 5 (1d6 + 2) Piercing damage, or 2 (1d4) Piercing damage if the swarm is Bloodied.
Cacophony - Wisdom Saving Throw: DC 10, one creature in the swarm’s space. Failure: The target has the Deafened condition until the start of the swarm’s next turn. While Deafened, the target also has Disadvantage on ability checks and attack rolls.