TEXT: LAvAWoRM 
  A fully grown lava worm is the most terrifying predator 
  to be found near lava or magma. Its entire body is super-
  heated to the same temperature as lava, allowing it to 
  withstand volcanic heat and tunnel into solid rock with 
  speed and ease. Some legends claim that lava worms 
  were born when a mad wizard tried to combine the fiery 
  power of a salamander with the might of a purple worm. 
  Others say it was created by the gods of earth and 
  flame, but it betrayed them and escaped to live beneath 
  the ground However most believe the lava worms are 
  simply a close relative of the purple worm adapted for 
  life near and within volcanoes. 
  A lava worm's saliva contains oils that cause fire to 
  bum hotter. It prefers to defend itself against serious 
  threats from afar, staying within lava and spitting flame 
  at the danger to wear them down. Evasive prey that it 
  can't consume in one bite may be easier to devour once 
  caught in the worm's lava breath. This worm has no 
  problem biting through solid rock to swallow restrained 
  prey using its super-heated jaws. 
  LAvAWORM 
  Gargantuan monstrosity, unaligned 
  Armor Class 20 (natural armor) 
  Hit Points 3 50 (20d20 + 140) 
  Speed 40 ft., burrow 30 ft. 
  SlR 
  28 (+9) 
  DEX 
  CON 
  INT 
  WIS 
  CHA 
  13 (+ l) 24 (+7) 4 (-3) 10 (+0) 
  6 (-3) 
  Saving Throws Con+ 13, Wis +6 
  Damage Immunities cold, fire 
  Senses blindsight 60 ft., tremorsense 120 ft., passive 
  Perception l 6 
  Languages-
  Challenge 20 (25,000 XP) 
  Heated Body. A creature that touches the worm or hits it 
  with a melee attack while within 5 feet of it takes 14 (4d6) 
  fire damage. At the start of each of the worm's turns, it 
  deals 14 (4d6) fire damage to any creature that is grappling 
  it and any object that is restraining it. 
  Lava Tunneler. The worm can burrow through lava, magma, 
  and solid rock. Its tremorsense treats lava and magma as if 
  it were solid stone. 
  Molten Tunnels. When the worm burrows, it leaves a l 0-
  foot diameter tunnel in its wake. The sides of this tunnel 
  remain burning hot for l 0 minutes, after which the tunnel 
  collapses. When a creature enters the tunnel for the first 
  time on a turn or starts its turn inside the tunnel, it takes 11 
  (2dl 0) fire damage. 
  Siege Monster. The worm deals double damage to objects 
  and structures, and it treats immunity to fire damage as 
  resistance to fire damage when it hits objects or structures 
  with its bite attack. 
  ART CREJIT: "Pyroclastic HeLion' By Simon Dominic 
  BY BENEVOLENT EVIL (@Evi'Benevolent) 
  VARIANT: YOUNG LAVA WORMS 
  For younger lava worms, use the statistics for a 
  remorhaz or young remorhaz (both found in the 
  Monster Manua~, but add the Lava Tunneler and 
  Molten Tunnels traits from the lava worm. 
  Actions 
  Multiattack The worm makes two attacks. 
  Bite. Melee Weapon Attack:+ l 5 to hit, reach l 0 ft., one 
  target. Hit: 28 (3dl 2 + 9) piercing damage plus 28 (8d6) 
  fire damage. If the target is a creature or a flammable 
  object, it ignites. Until a creature takes an action to douse 
  the fire, the target takes 11 (2d l 0) fire damage at the start 
  of each of its turns. In addition, if the target is a Large or 
  smaller creature, it must succeed on a DC 20 Dexterity 
  saving throw or be swallowed by the worm. 
  While swallowed, the creature is blinded and restrained, it 
  has total cover against attacks and other effects outside the 
  worm, and it takes 21 (6d6) acid damage plus 21 (6d6) fire 
  damage at the start of each of the lava worm's turns. If the 
  worm takes 40 damage or more on a single turn from a 
  creature inside it, the worm must succeed on a DC 2 5 
  Constitution saving throw at the end of that turn or regur-
  gitate all swallowed creatures, which fall prone in a space 
  within 10 feet of the worm. If the worm dies, a swallowed 
  creature is no longer restrained by it and can escape from 
  the corpse using l 5 feet of movement, exiting prone. 
  Flame Spit Ranged Spell Attack:+ 13 to hit, range 120 ft., 
  one creature. Hit: 5 5 (8d l 0 + 7) fire damage. If the target 
  is a creature or a flammable object, it ignites. Until a 
  creature takes an action to douse the fire, the target takes 
  11 (2dl 0) fire damage at the start of each of its turns. 
  Breath Weapon (Recharge 5-6). The worm sprays molten 
  rock in a 60-foot cone. Each creature in that area must 
  make a DC 21 Dexterity saving throw, taking 5 5 (1Od10) 
  fire damage on a failed save, or half as much damage on a 
  successful one. On a failed saving throw, a creature is also 
  restrained by the hardening rock. A creature can make a DC 
  21 Strength (Athletics) check as an action, freeing itself or 
  a creature within reach from the rock on a success. The 
  rock has AC l 7 and 60 hit points, and it is immune to fire, 
  poison, and psychic damage, but it is vulnerable to any 
  damage dealt by a lava worm's bite attack. 
  ( vl.0) FROM THE ELEMENTS AND 
  BEYOND 
  D&D UNLEASHED 
  
SOURCE: textdata/thevault/Dungeons & Dragons [multi]/5th Edition (5e)/3rd Party/D&D Unleashed/Previews from The Elements & Beyond/D&D Unleashed - Lava Worm (1p0).pdf