monster

Lithovore Behemoth

Gargantuan Monstrosity, Unaligned

Reveal Stat Block

Speed

40 ft.

armor class

hit points

402

challenge

str

+10

dex

-1

con

+10

int

-2

wis

cha

Saving Throws STR +17, CON +17, WIS +9

Damage Resistances Fire; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks

Damage Immunities Poison

Condition Immunities Charmed, Frightened, Paralyzed, Petrified, Poisoned

Senses Tremorsense 120 ft., Passive Perception 12

Languages -

Traits

Siege Monster.The behemoth deals double damage to objects and structures.

Aether-Siphon.Any creature that starts its turn within 30 feet of the behemoth must succeed on a DC 22 Intelligence saving throw or have its highest-level available spell slot expended. The behemoth regains 10 hit points per spell slot level consumed this way.

Legendary Resistance (3/Day).If the behemoth fails a saving throw, it can choose to succeed instead.

Actions

Multiattack.The behemoth makes two attacks: one with its slam and one with its stomp.

Slam.Melee Weapon Attack: +17 to hit, reach 15 ft., one target. Hit: 28 (4d8 + 10) bludgeoning damage.

Stomp.Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 32 (4d10 + 10) bludgeoning damage. If the target is a creature, it must succeed on a DC 25 Strength saving throw or be knocked prone.

Magma Beam (Recharge 5-6).The behemoth exhales a beam of magma in a 90-foot line that is 10 feet wide. Each creature in that line must make a DC 25 Dexterity saving throw, taking 77 (22d6) fire damage on a failed save, or half as much on a successful one.

Legendary Actions

Earthquake.The behemoth stomps the ground, causing a localized tremor. Each creature on the ground within 30 feet of it must succeed on a DC 25 Dexterity saving throw or be knocked prone.

Siphon Pulse (Costs 2 Actions).The behemoth releases a pulse of aether-draining energy. Each spellcaster within 60 feet must succeed on a DC 22 Charisma saving throw or be unable to cast spells until the end of its next turn.

Lithovore Behemoth

Type: Monstrosity / Siege Beast Threat Level: Extreme (Legendary Creature)

The Lithovore Behemoth is a creature of ancient myth and terrifying reality, a massive, mountain-sized beast that literally "eats the earth" to fuel its immense physical and magical power. Standing over sixty feet tall, its body is composed of a dense, metallic hide reinforced with jagged rock and Aether-crystals. It roams the most remote parts of the Western Continent, leaving behind massive, glass-lined trenches where it has consumed the soil and bedrock to extract raw Aether and minerals.

In combat, a Lithovore is almost unstoppable. Its massive feet can cause localized earthquakes, and its "Aether-Siphon" ability allows it to drain the magic from nearby items and spellcasters to power its own devastating attacks. It can fire beams of concentrated, high-pressure magma from its mouth and has a roar that can shatter stone for miles. Defeating a Lithovore is not just a battle; it is a strategic operation, usually requiring the use of heavy Steamfort siege engines and multiple Kigum battle-mage units to even pierce its hide.

Plot Hooks:

The Behemoth's Path: A Lithovore Behemoth is on a direct collision course with Fortune's Lake Town. The party must find a way to divert the beast or disable it before it consumes the entire settlement.
The Behemoth's Hoard: It is rumored that the stomach of a Lithovore contains a hoard of perfectly refined minerals and ancient, indestructible artifacts it has swallowed over the centuries. A group of "Scavenger Guilds" hires the party to "mine" the beast.
The Controlled Behemoth: The Obsidian Scale is attempting to use a massive "Aether-Collar" to take control of a Lithovore and use it as a living siege engine against Steamfort. The party must destroy the collar and the cultists before the beast is unleashed.