b'Crystal Swarm \n'b'  Large   swarm of Tiny Elementals ,  unaligned  \n'b'  Armor Class  14 (natural armor)  Hit Points  76 (8d10 + 32)  Speed  30 ft., fly 30 ft. (hover)\n'b' STATS STR: 12 (+1) DEX:  18 (+4)  CON:  15 (+2)  INT:  4 (-3)  WIS:  10 (+0)  CHA:  8 (-1)  \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  blindsight 30 ft., passive  Perception  10  Languages  understands Terran but can\xe2\x80\x99t speak  Challenge  5 (1800 XP)  Proficiency Bonus  +3 \n'b' SPECIAL TRAITS \n'b'\n'b'  False Appearance . While the swarm remains motionless and isn\xe2\x80\x99t flying, it is indistinguishable from a normal pile of crystals. \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 elemental. The swarm can\xe2\x80\x99t regain  hit points  or gain  temporary hit points . \n'b'\n'b' ACTIONS \n'b'\n'b'  Multiattack . The swarm can  attack  every hostile creature in its space with Swirling Crystals. \n'b'  Swirling Crystals .  Melee Weapon Attack : +7 to hit, reach 0 ft., one target in the swarm\xe2\x80\x99s space.  Hit : 10 (4d4) slashing and 10 (4d4) psychic damage, or 5 (2d4) slashing and 5 (2d4) psychic damage if the swarm has half of its  hit points  or fewer. \n'b'  Devour Thoughts (Recharge 5\xe2\x80\x936) . A creature in the swarm\xe2\x80\x99s space must succeed on a DC 13  Intelligence  saving throw or be  restrained  for 1 round and take 28 (8d6) psychic damage as the swarm rips memories from the target\xe2\x80\x99s mind. \n'b'  Devour Thoughts . At Gm discretion, roll a d4, and on a roll of 4, the memory taken is one the creature will notice missing. Memories return to an affected target if they are within 300 feet after the swarm\xe2\x80\x99s death. After 3 rounds, the memories fade into nothingness if unclaimed. It is not unheard of for returned memories to be entangled with the lost memories of others. \n'b'\n'b' Variants \n'b' Necrotic energy can seep into crystals and spread like a toxin, giving them a pulsing, cloudy purple-black appearance that surges when they move, as if they were filled with oil or smoke. This is a corrupted crystal swarm: use the crystal swarm above, except its attacks deal necrotic damage instead of psychic damage and any memories stolen during Devour Thoughts are immediately destroyed and irretrievable, short of using a  wish  spell or similar magic.'