Grootslang

Gargantuan aberration, chaotic evil

Armor Class

19 (natural armor)

Hit Points

264 (16d20 + 96)

Speed

40 ft., swim 30 ft.

Skills

Perception +7

Senses

darkvision 120 ft.

Languages

Primordial

Challenge

12

Magic Resistance

The Grootslang has advantage on saving throws against spells and other magical effects.

Regeneration

The Grootslang regains 10 hit points on each of its turns as long as it has 1 hit point.

Siege Monster

The Grootslang deals double damage to objects and structures.

Actions

Multiattack

The Grootslang makes three melee attacks, one of which can be a bite attack.

Bite

Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 29 (5d8 + 7) piercing damage.

Stomp

Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 25 (4d8 + 7) bludgeoning damage.

Trumpet Blast (Recharge 4-6)

The Grootslang blasts a thunderous noise from its trunk in a 90-foot cone. Each creature in the area must make a DC 17 Constitution saving throw or take 45 (10d8) thunder damage, half damage on a success.