Kryx RPGThemesMonsters

Leviathan

Gargantuan elemental
Challenge
20 (25,000 XP)

STR
10
DEX
7
CON
10
INT
−4
WIS
4
CHA
3

328
16d20+160
17
Fort
+10
Ref
+8
Will
+9
Damage resistances bludgeoning, piercing, slashing from nonmagical attacks
Damage immunities acid, poison
Condition immunities exhausted, grappled, paralyzed, petrified, poisoned, prone, restrained, stunned

Speed 12 m., swim 35 m.
Senses darkvision 18 m., passive Perception 14
Skills Primal +13
Languages Aquan

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

Maneuvers. The leviathan uses maneuvers (maneuver save DC 24). It has 28 stamina dice which are d8s, a dice limit of 7, regains all expended stamina dice when it finishes a long rest and regains half its total stamina dice when it finishes a short rest, and knows the following maneuvers:

1 stamina die: ambush, bonecrush, debilitating crush, disorient, fearsome beast, fountain of blood, glancing blow, hammer through, hammering blow, knockback, spring attack

2 stamina dice: tremoring strike

Partial Freeze. If the leviathan takes 50 cold damage or more during a single turn, the leviathan partially freezes; until the end of its next turn, its speeds are reduced to 6 meters, and it makes attack rolls with disadvantage.

Siege Monster. The leviathan deals double damage to objects and structures (included in Tidal Wave).

Spellcasting. The leviathan is a 25th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 17, +9 to hit with spell attacks). It has 9 mana, a mana limit of 4, regains all expended mana when it finishes a long rest and regains half its total mana (rounded up) when it finishes a short rest, and knows the following spells:

Cantrips (at will): hydraulic push, shape water

1 mana: animate water, create/destroy/purify water, desiccate, ebb and flow, fog cloud, locate water, slick skin, tidal breaker, tidal surge, tidal wave, water jet, water whip, wave shield

2 mana: control water, drown, horrid wilting, purify, wall of water, water breathing, water walk, watery form, watery sphere

3 mana: maelstrom

Water Form. The leviathan can enter a hostile creature’s space and stop there. It can move through a space as narrow as 2.5 centimeters wide without squeezing.

Actions

Multiattack. The leviathan makes two attacks: one with its slam and one with its tail.

Slam. Melee Weapon Attack: +16 to hit, reach 6 m. Hit: 15 (1d10 + 10) bludgeoning damage plus 5 (1d10) acid damage.

Tail. Melee Weapon Attack: +16 to hit, reach 6 m. Hit: 16 (1d12 + 10) bludgeoning damage plus 6 (1d12) acid damage.

Legendary Actions

The leviathan can take 3 legendary actions, choosing from the options below. Only one legendary option can be used at a time and only at the end of another creature’s turn. The leviathan regains spent legendary actions at the start of its turn.

Move. The leviathan moves up to its speed.

Slam (Costs 2 Actions). The leviathan makes one slam attack.

Coastal, Underwatermtof