# Arcane Leviathan

*Gargantuan* *Construct* *unaligned*

- **Armor Class:** 17 (natural armor)
- **Hit Points:** 279 (18d20+90)
- **Speed:** walk 10 ft. swim 60 ft.
- **Challenge Rating:** 16 (15,000 XP)
- **Source:** Tome of Beasts 3, page 40

| STR | DEX | CON | INT | WIS | CHA |
| --- | --- | --- | --- | --- | --- |
| 26 (+8) | 5 (-3) | 21 (+5) | 5 (-3) | 17 (+3) | 8 (-1) |

- **Saving Throws**: Str +1, Con +1, Int +2, Wis +8, Cha +4
- **Skills:** perception +3
- **Damage Immunities:** lightning, poison, psychic
- **Damage Resistances:** acid, thunder; nonmagic B/P/S attacks
- **Condition Immunities:** blinded, charmed, deafened, exhaustion, frightened, paralyzed, petrified, poisoned
- **Senses:** truesight 120', passive Perception 13
- **Languages:** understands creator's languages but can't speak

### Special Abilities

- **Construct Nature:** Doesn't require air food drink or sleep.
- **Impregnable:** If subjected to an effect that allows it to make a save to take only half damage it instead takes no damage if it succeeds on the save and only half damage if it fails.
- **Siege Monster:** Double damage to objects/structures.

### Actions

- **Multiattack:** One Slam and two Claws or four Lightning Bolts.
- **Claw:** Melee Weapon Attack: +13 to hit, 15 ft., one target, 26 (4d8+8) slashing damage. If target is Huge or smaller it is grappled (escape DC 19). Leviathan has two claws each of which can grapple only one target.
- **Slam:** Melee Weapon Attack: +13 to hit, 5 ft., one target, 18 (4d4+8) bludgeoning damage and target: DC 19 Str save or be knocked prone.
- **Lightning Bolt:** Ranged Spell Attack: +8 to hit 150/600' one target 17 (4d6+3) lightning.
- **Pylon Discharge (Recharge 5-6):** Discharges energy surge at a point it can see within 200' of it. Each creature within 30' of that point: 45 (10d8) lightning and is blinded until the end of its next turn (DC 19 Dex half damage not blinded).

### Bonus Actions

- **Arcane Barrage:** Sends arcane energy toward a creature it can see within 120' of it. Target begins to glow with arcane energy and at end of target's next turn: 35 (10d6) radiant (DC 19 Con half). Damage is divided evenly between target and all creatures within 10 ft. of it except leviathan.