b'Rat Swarm, Hivemind \n'b'  Huge   swarm of Tiny beasts ,  unaligned  \n'b'  Armor Class  10  Hit Points  136 (13d12 + 52)  Speed  30 ft.\n'b' STATS STR: 10 (+0) DEX:  10 (+0)  CON:  19 (+4)  INT:  15 (+2)  WIS:  12 (+1)  CHA:  3 (-4)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Damage Resistances  bludgeoning, piercing, slashing  Condition Immunities   charmed ,  frightened ,  grappled ,  paralyzed ,  petrified ,  prone ,  restrained ,  stunned   Senses   darkvision  30 ft., passive  Perception  14  Languages  telepathy 30 ft.  Challenge  8 (3,900 XP) \n'b' SPECIAL TRAITS \n'b'\n'b'  Innate Spellcasting (Psionics) . The swarm\xe2\x80\x99s innate spellcasting ability is  Intelligence  (spell save DC 13). As long as it has more than half of its  hit points  remaining, the swarm can innately cast the following spells, requiring no components:\n'b'\n'b'\n'b'  At will :  command ,  comprehend languages ,  detect thoughts  \n'b'  1/day each :  confusion ,  dominate monster  \n'b'\n'b'  Keen Smell . The swarm has advantage on  Wisdom  ( Perception ) checks that rely on smell. \n'b'  Swarming . 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 beast. The swarm can\xe2\x80\x99t regain  hit points  or gain  temporary hit points . A swarm takes half damage from attacks that use an  attack  roll and double damage from effects that require it to make a saving roll. Creatures that are not swarms are impaired while they remain in the swarm\xe2\x80\x99s space or within 5 feet of it and have disadvantage on  attack  rolls and  Constitution  saving throws to maintain concentration. The area of the swarm is considered  difficult terrain . \n'b'\n'b' ACTIONS \n'b'\n'b'  Swarming Bite . Each creature that shares a space with the swarm automatically takes 17 (5d6) piercing damage or 10 (3d6) piercing damage if the swarm has half of its  hit points  or fewer.'