Elder Wyrm

Physiology

Draconian

Size

Gargantuan

Speed

30 ft., burrow 60 ft.

Armor class

20 (ancient plate)

Hit points

227 (13d20 + 91)

Proficiency

+5

• STR 26 +8 save +13
• DEX 11 +0 save +0
• CON 24 +7 save +12
• INT 14 +2 save +2
• WIS 16 +3 save +8
• CHA 15 +2 save +2

Skills

Perception +8

Passive Perception

18

Senses

tremorsense 180 ft., blindsight 60 ft.

Languages

Draconic, Primordial

Damage resistances

bludgeoning, piercing, slashing

Damage immunities

acid

Condition immunities

blinded , prone , frightened

Found in

Subterranean , Lower Atmosphere

Traits

• Legendary Resistance

  Twice per day, when it fails a saving throw, it may choose to succeed instead.

• Siege Frame

  Deals double damage to objects and structures.

Actions

• Bite

  +13 to hit · reach 20 ft.

  3d12 + 8 piercing damage

  Two attacks. A Large or smaller creature hit by both is held in the jaws and Restrained.

• Swallow

  DC 20 Dexterity save

  One Large or smaller creature the wyrm hit this turn is swallowed on a failed save, taking 6d6 acid damage at the start of each of the wyrm's turns.

• Coil Legendary

  +13 to hit · reach 20 ft.

  3d10 + 8 bludgeoning damage

  The wyrm attacks one creature it can see with a coil of its body.

• Shifting Ground Reaction

  DC 21 Dexterity save

  When a creature within 60 feet standing on rock or soil hits the wyrm, that creature makes a Dexterity saving throw or falls Prone and slides 15 feet toward the wyrm.

• Coil Legendary

  The wyrm attacks one creature it can see with a coil of its body.

• Subside Legendary

  The wyrm burrows up to half its speed. It leaves no opening behind it and provokes no opportunity attacks.

• Seismic Event Legendary

  DC 20 Constitution save

  Costs two legendary actions. Every creature within 60 feet touching the ground makes a Constitution saving throw or takes 4d10 thunder damage and is Deafened until the end of its next turn.