b'Shale Behemoth \n'b'  Family:   Shale  \n'b'  Gargantuan   elemental ,  unaligned  \n'b'  Armor Class  20 (natural armor)  Hit Points  409 (21d20 + 189)  Speed  40 ft., burrow 40 ft.\n'b' STATS STR: 30 (+10) DEX:  10 (+0)  CON:  29 (+9)  INT:  3 (-4)  WIS:  18 (+4)  CHA:  10 (+0)  \n'b'\n'b'\n'b'\n'b'\n'b'\n'b'\n'b'  Saving Throws   Dex  +7,  Con  +16,  Wis  +11  Skills   Stealth  +7  Damage Resistances  piercing, slashing  Senses   darkvision  60 ft., tremorsense 120 ft., passive  Perception  14  Languages  \xe2\x80\x93  Challenge  23 (50,000 XP)  Proficiency Bonus  +7 \n'b' SPECIAL TRAITS \n'b'\n'b'  Stone Camouflage . The behemoth has advantage on  Dexterity  ( Stealth ) checks made to  hide  in rocky terrain. \n'b'  Tunneler . The behemoth can burrow through solid rock at half its burrow speed and leaves a 15-foot-diameter tunnel in its wake. \n'b'\n'b' ACTIONS \n'b'\n'b'  Multiattack . The behemoth makes three claw attacks or hurls three shards. It can replace one  attack  with Crystal Prison. \n'b'  Claw .  Melee Weapon Attack : +17 to hit, reach 20 ft., one target.  Hit : 36 (4d12 + 10) piercing damage. If the target is a Large or smaller creature, it is  grappled  (escape DC 20). \n'b'  Crystal Prison .  Melee Weapon Attack : +17 to hit, reach 20 ft., one target  grappled  by the behemoth.  Hit : 28 (4d8 + 10) piercing damage, and the target is impaled on the behemoth\xe2\x80\x99s jagged carapace until the grapple ends. While impaled, the target moves with the behemoth and takes 19 (3d12) piercing damage at the start of each of the behemoth\xe2\x80\x99s turns. \n'b'  Hurl Shard .  Ranged Weapon Attack : +17 to hit, range 60/120 ft., one target.  Hit : 28 (4d8 + 10) piercing damage. On a hit or miss, a humming shard lands in the target\xe2\x80\x99s space. At the start of the behemoth\xe2\x80\x99s next turn, the shard explodes. Each creature within 20 feet of the shard when it explodes must make a DC 24  Dexterity  saving throw, taking 16 (3d10) thunder damage and 16 (3d10) piercing damage on a failed saving throw, or half as much damage on a successful one. \n'b'  Screeching Scrape (Recharge 5-6) . The behemoth rubs its crystalline joints against the ground or a nearby wall, causing a deafening squeal of mineral on rock. Creatures within 60 feet of the behemoth that can hear the squeal must make a DC 24  Constitution  saving throw. On a failure, a creature takes 65 (10d12) thunder damage, is  deafened  for 24 hours, and is  stunned  until the end of its next turn. On a success, a creature takes half as much damage and isn\xe2\x80\x99t  deafened  or  stunned . \n'b'\n'b' ABOUT \n'b' A shale behemoth\xe2\x80\x99s body is covered in a dragon\xe2\x80\x99s horde worth of rubies, sapphires, emeralds, and other gemstones. Mysteriously, many shale behemoths grow not only mundane minerals and gems on their carapaces, but also alchemical and magical stone items such as thunderstones, elemental gems, and even powerful crystal balls. \n'b' In addition to the mundane gems and the magical items that protrude from a shale behemoth\xe2\x80\x99s body, this gentle giant grows a unique form of acoustically sensitive crystal that can generate and amplify deafening sonic signals. A shale behemoth won\xe2\x80\x99t usually go out of its way to attack smaller creatures, but when threatened, the animal can use its resonant crystals to generate bone-shaking shockwaves and eardrum-rupturing reverberations. \n'b' The most venerable of all shale spitters are called shale behemoths. These mountainous monstrosities resemble quaking mounds of chitinous plating, sedimentary rock, and mineral formations. Countless crystalline structures and gemstone deposits pock the ancient being\xe2\x80\x99s carapace, creating a constellation of dazzling jewels that range from common quartz to lustrous diamond. Their massive  size  means shale behemoths confine themselves to only the largest underground caverns. When it must relocate, a behemoth\xe2\x80\x99s lumbering journey shakes the entire mountain in which it dwells.'