Undead Whale (5e Creature)

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Undead Whale[edit]

Gargantuan undead, neutral evil

Armor Class 22 (natural armor)
Hit Points 555 (30d20 + 240)
Speed 5 ft., swim 50 ft.

30 (+10) 6 (-2) 27 (+8) 3 (-4) 10 (+0) 1 (-5)

Damage Resistances fire
Damage Immunities cold, acid, poison
Condition Immunities charmed, exhaustion, poisoned, unconscious
Senses blindsight 60 ft., darkvision 60 ft., passive Perception 10
Challenge 10 (5,900 XP)

Gentle Giant. The undead whale always attacks at lowest initiative.

Lumbering Behemoth. The undead whale takes actions only every second round.


Swallow. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 5 (1d10) bludgeoning damage and the target must succeed on a DC 20 Dexterity saving throw or be swallowed. A swallowed creature is blinded and restrained, it has total cover against attacks and other effects outside the undead whale, and it takes 21 (6d6) acid damage at the start of each of the undead whale's turns.
If the undead whale takes 30 damage or more on a single turn from a creature inside it, the undead whale must succeed on a DC 21 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of the undead whale. If the undead whale dies, a swallowed creature is no longer restrained by it and can escape from the corpse by using 20 feet of movement, exiting prone.

Tail. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 24 (4d6 + 10) bludgeoning damage.

Rotting Corpse (5/Day). The undead whale casts either the insect plague spell or the stinking cloud spell (spell save DC 14). Wisdom is its spellcasting ability when it casts either spell in this way.

An undead whale is a magical transport, mobile home and lair for a sea hag which can travel above or below water or be beached as the sea hag desires.
The entire huge creature is disgustingly foul to most senses and liable to cause nausea and similar effects. Typically the blubber flash is bleached and white with the outer skin peeling and cracked. There might also be barnacles and old embedded harpoons.
On an underwater dive, the carcass can retain air internally for as long as the sea hag chooses—but cannot be renewed without surfacing (some internal spaces might contain demiplanes or portals to other locations—these might replace lost air and will often be significantly larger on the inside and may even contain an entire dungeon of interlinked soft organic chambers and passages with a variety of inhabitants) and if the hag chooses the air can be released but she cannot replace it without resurfacing.
The dripping rotting flesh can contain various unpleasant small creatures—crabs, rot grubs, green slime and fouler things besides, while seagulls flock overhead.
The stomach of the whale is a typical sea hag lair with seaweed bed and appropriate beach combed furniture, with other organs used as storage sacks.

Undead Nature. A undead whale doesn't require air, food, drink, or sleep.

Undead whales are the size and hit points of a kraken or tarrasque and have the potential to destroy a party quickly at the whim of the sea hag—and are more designed to be encountered beached as a horrific form of sea hag lair than an active creature—although it can be used to attack characters or break up other ships the intent is more to give the sea hag a form of ship suited to her nature. It could be met on a lonely beach or perhaps encountered by shipwrecked PC's adrift at sea with the sea hag offering 'rescue' in return for a special favor.

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