Necrotech Thunderer
Huge Undead, neutral evil
Armor Class 14 (natural armor)
Hit Points 126 (11d12+55)
Speed walk +20
Challenge 8
Saving Throws dex +0, wis +5
Skills perception +2
Damage Resistances nonmagic B/P/S attacks
Damage Immunities necrotic, poison
Condition Immunities blinded, poisoned
Senses blindsight 120', passive Perception 15
Languages understands Common and Darakhul but can't speak
Special Abilities
Siege Monster. Double damage to objects/structures.
Turn Resistance. Advantage: saves vs. turn undead effects.
Undead Nature. Doesn't require air food drink or sleep.
Actions
Multiattack. Two Trample attacks.
Trample. Melee Weapon Attack: +8 to hit, 5 ft., one target, 21 (3d10+5) bludgeoning damage.
Ballista Shot. Chooses up to two points it can see within 120' of it. The thunderer can't choose a point within 10 ft. of it. Each creature within 5 ft. of a point must make a DC 15 Con save taking 14 (4d6) necrotic on a failed save and half damage if made. If a creature is within 5 ft. of both points it has disadvantage on the save but it takes damage from only one effect not both.
Concentrated Shot (Recharge 5-6). Picks a point it can see within 120' of it. Each creature within 20' of that point must make a DC 15 Con save. On a failure a creature takes 35 (10d6) necrotic and suffers one level of exhaustion. On a success a creature takes half the damage and doesn't suffer a level of exhaustion.
Source: Tome of Beasts 3 · OGL/Open