Stone Juggernaut

Large Construct, Unaligned

AC: 15

Initiative: +1 (11)

HP: 157 (15d10 + 75)

Speed: 50 ft. (in one direction chosen at the start of its turn)

STR: 16 (+3)
DEX: 12 (+1)
CON: 15 (+2)
INT: 14 (+2)
WIS: 14 (+2)
CHA: 16 (+3)

Immunities: poison; bludgeoning, piercing, slashing from nonmagical attacks not made with adamantine weapons

Condition Immunities: blinded; charmed; deafened; exhaustion; frightened; paralyzed; petrified; poisoned; prone

Senses: blindsight 120 ft., Passive Perception 10

CR: 12 (XP 8,400; PB +4)

Devastating Roll.

The juggernaut can move through the space of a prone creature. A creature whose space the juggernaut enters for the first time on a turn must make a DC 17 Dexterity saving throw, taking 55 (10d10) bludgeoning damage on a failed save, or half as much damage on a successful one.

Immutable Form.

The juggernaut is immune to any spell or effect that would alter its form.

Regeneration.

As long as it has 1 hit point left, the juggernaut magically regains all its hit points daily at dawn. The juggernaut is destroyed and doesn't regenerate if it drops to 0 hit points.

Siege Monster.

The juggernaut deals double damage to objects and structures.

Actions

Slam.

Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 25 (3d12 + 6) bludgeoning damage. If the target is a Large or smaller creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.

Find this creature in the encounter builder

Source: Tomb of Annihilation, p. 231 - Licenses and attribution