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Ancient Leviathan
Large aberration • CR 9 • Vengeful
Ancient Leviathan, Vengeful. Large aberration, neutral evil. Fused from Scorpion (Mortal Kombat) × Venom (Marvel). Optional table creature — not Encounter E01–E08.
Stat block
| Armor Class | 16 (16 (natural armor)) |
| Hit Points | 203 (27d10 +54) |
| Speed | 30 ft., climb 30 ft. |
| STR / DEX / CON | 19 / 19 / 15 |
| INT / WIS / CHA | 11 / 12 / 15 |
| Saves | Dex +8, Str +8 |
| Skills | Perception +5, Deception +6, Athletics +8 |
| Resistances | fire, necrotic, slashing |
| Immunities | fire |
| Senses | darkvision 120 ft., passive Perception 15 |
| Languages | Common, Abyssal, Deep Speech |
| Challenge | 9 (5,000 XP) |
Traits
Burning Nimbus. At the start of each of Ancient Leviathan's turns, each creature within 5 feet of it takes 6 fire damage, and flammable objects in the aura ignite.
Shadow Step. While in dim light or darkness, Ancient Leviathan can use a bonus action to teleport up to 30 feet to an unoccupied space it can see that is also in dim light or darkness.
Relentless. If Ancient Leviathan takes 28 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead (once per short rest).
Actions
Multiattack. Ancient Leviathan makes 2 Kunai Chain attacks. It can replace one attack with We Are.
Kunai Chain. Melee Weapon Attack: +8 to hit, reach 20 ft., one target. Hit: 31 (7d8 -1) slashing damage plus 13 (3d6 +2) fire damage. The target is pulled up to 10 feet toward the chimera.
We Are. The chimera tries to wear the target like a coat. Each creature in one creature within 10 feet must make a DC 16 Strength saving throw, taking 51 (11d8 +1) acid damage on a failed save, or half as much damage on a successful one. A Medium or smaller creature that fails is grappled and blinded by living slime.
Bonus actions
Step Through Ash. Ancient Leviathan uses Shadow Step.
Reactions
Punish the Opening. When a creature within 10 feet of Ancient Leviathan misses it with a melee attack, Ancient Leviathan can make one Kunai Chain attack against that creature.
Ancient Leviathan hunts as if remembering every war its parent silhouettes ever lost. Print this original name. Do not letter the source villains on a mat.
Tactics. Ancient Leviathan closes immediately and pins the most armored warrior. Once adjacent, it stays there, daring the party to disengage and eating opportunity attacks. Below a quarter of its hit points it attempts a fighting withdrawal toward cover or its lair.
Pinned sources for this plate: mk-scorpion, mv-venom. Re-forge from the Chimera Forge with the same pins if you want a new name on the same bones.