Swarm of Bats

Size: Medium Type: Beast Alignment: unaligned Armor Class: 12 Hit Points: 22 Hit Dice: 5d8 Speed: "fly": 30, "walk": 0 Challenge Rating: 1/4 Actions: ["attack_bonus": 4, "damage_dice": "2d4", "desc": "Melee Weapon Attack: +4 to hit, reach 0 ft., one creature in the swarm's space. Hit: 5 (2d4) piercing damage, or 2 (1d4) piercing damage if the swarm has half of its hit points or fewer.", "name": "Bites"] Special Abilities: ["desc": "The swarm can't use its blindsight while deafened.", "name": "Echolocation", "desc": "The swarm has advantage on Wisdom (Perception) checks that rely on hearing.", "name": "Keen Hearing", "desc": "The swarm can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a Tiny bat. The swarm can't regain hit points or gain temporary hit points.", "name": "Swarm"]