b'Swarm of Undead Bats \n'b'  Family:   Swarm  \n'b'  Medium   swarm of Tiny undead ,  chaotic evil  \n'b'  Armor Class  12 \n'b' Hit Points  22 (5d8) \n'b' Speed  0 ft., fly 30 ft.\n'b' STATS STR: 5 (\xe2\x80\x933) DEX:  15 (+2)  CON:  10 (+0)  INT:  2 (\xe2\x80\x934)  WIS:  12 (+1)  CHA:  4 (\xe2\x80\x933)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Damage Resistances  bludgeoning, piercing, slashing \n'b' Damage Immunities  poison \n'b' Condition Immunities   charmed ,  frightened ,  grappled ,  paralyzed ,  petrified ,  poisoned ,  prone ,  restrained ,  stunned  \n'b' Senses  blindsight 60 ft.,  darkvision  60 ft., passive  Perception  11 \n'b' Languages  \xe2\x80\x94 \n'b' Challenge  1/4 (50 XP) \n'b' SPECIAL TRAITS \n'b'\n'b'  Echolocation . The swarm can\xe2\x80\x99t use its blindsight while  deafened . \n'b'  Keen Hearing . The swarm has advantage on  Wisdom  ( Perception ) checks that rely on hearing. \n'b'  Swarm . The swarm can occupy another creature\xe2\x80\x99s space and vice versa, and the swarm can move through any opening large enough for a Tiny  bat . The swarm can\xe2\x80\x99t regain  hit points  or gain  temporary hit points . \n'b'\n'b' ACTIONS \n'b'\n'b'  Bites .  Melee Weapon Attack : +4 to hit, reach 0 ft., one creature in the swarm\xe2\x80\x99s space.  Hit : 5 (2d4) piercing damage, or 2 (1d4) piercing damage if the swarm has half its  hit points  or fewer. \n'b'\n'b' ABOUT \n'b' Undead  bat  swarms are collections of dead bats that still  fly  as if they were living, breathing creatures. The bats  attack  with hundreds of tiny bites as they swarm their prey.'