Adult Earth Dragon

Living Mountain

The dragon ignores difficult terrain made of earth or stone. While touching the ground, it regains 10 hit points at the start of its turn if it has at least 1 hit point remaining.

Siege Beast

The dragon deals double damage to objects and structures.

Earth Glide

The dragon can burrow through nonmagical earth and stone without disturbing the material.

Stonehide

Critical hits against the dragon become normal hits unless the attacker deals thunder damage.

Multiattack

The dragon makes three attacks: one with its Bite and two with its Claws.

Bite

Melee Weapon Attack: +13 to hit, reach 15 ft., one target.
Hit: 21 (3d8 + 8) piercing damage plus 9 (2d8) bludgeoning damage.

Claw

Melee Weapon Attack: +13 to hit, reach 10 ft., one target.
Hit: 17 (2d8 + 8) slashing damage.

If the target is Large or smaller, it must succeed on a DC 21 Strength saving throw or be knocked prone.

Tail Slam

Melee Weapon Attack: +13 to hit, reach 20 ft., one target.
Hit: 19 (2d10 + 8) bludgeoning damage.

The target must succeed on a DC 21 Strength saving throw or be pushed 20 feet.

Stone Breath (Recharge 5–6)

The dragon exhales a storm of jagged stone and crushing earth in a 60-foot cone.

Each creature in the area must make a DC 20 Dexterity saving throw.

On a failed save, a creature takes 54 (12d8) bludgeoning damage and becomes restrained by stone until the end of its next turn. On a successful save, it takes half damage and isn’t restrained.

Structures in the area take double damage.

Earthquake Roar (Recharge 6)

The dragon unleashes a thunderous roar that shakes the ground in a 40-foot radius centered on itself.

Creatures on the ground must succeed on a DC 20 Constitution saving throw or take 27 (6d8) thunder damage and fall prone.

The area becomes difficult terrain until cleared.

Burrowing Rush

The dragon moves up to half its burrow speed without provoking opportunity attacks. It can emerge from the ground at any point during this movement.

Stone Spikes

When a creature moves within 15 feet of the dragon, the dragon erupts spikes of stone from the ground.

The creature must succeed on a DC 20 Dexterity saving throw or take 14 (4d6) piercing damage and have its speed reduced to 0 until the end of its turn.