Cthulhu

CreatureRHWp. 1062024

Gargantuan aberration, chaotic evil

Armor Class
19
Hit Points
385 (22d20 + 154)
Speed
swim 60 ft., 30 ft., climb 30 ft.
Challenge
25 (75,000 XP)
STR
29
+9
DEX
12
+1
CON
25
+7
INT
28
+9
WIS
18
+4
CHA
24
+7
Saving Throws
Cha +15, Con +15, Wis +12
Skills
Insight +12, Perception +12, Persuasion +15
Damage Resistances
acid; cold; lightning; psychic
Condition Immunities
charmed; exhaustion; frightened; paralyzed; poisoned
Senses
Truesight 120 ft., passive Perception 22
Languages
all; telepathy 120 ft.

Traits

Amphibious.

Cthulhu can breathe air and water.

Darklord Restoration.

If Cthulhu dies, it revives with all its Hit Points in 1d10 weeks inside the Vault of Cthulhu.

Impossible Geometry.

Ground, air, and water in a 10-foot Emanation originating from Cthulhu is Difficult Terrain. A creature that starts its turn in the Emanation takes 7 (2d6) Bludgeoning damage.

Legendary Resistance (4/Day, or 5/Day in Domain).

If Cthulhu fails a saving throw, it can choose to succeed instead.

Magic Resistance.

Cthulhu has Advantage on saving throws against spells and other magical effects.

Actions

Multiattack.

Cthulhu makes three Eldritch Claw attacks and uses Spellcasting to cast Befuddlement if available or Mind Spike (level 4 version). It can replace one Eldritch Claw attack with a use of Tentacle.

Eldritch Claw.

Melee Attack Roll: +17, reach 10 ft. Hit: 18 (2d8 + 9) Slashing damage plus 9 (2d8) Acid damage. If the target is a Large or smaller creature, it has the Grappled condition (escape DC 19) from one of two limbs.

Tentacle.

con DC 25, one creature Grappled by Cthulhu. 21 (6d6) Acid damage plus 13 (3d8) Psychic damage. Half damage. The target's Hit Point maximum decreases by an amount equal to the Psychic damage taken, and Cthulhu regains Hit Points equal to that amount.

Bonus Actions

Warp.

Cthulhu teleports to an unoccupied space it can see within 120 feet, taking creatures it is grappling with it. Then each creature within 10 feet of the space it left is subjected to the following effect. str DC 25. 7 (2d6) Bludgeoning damage plus 7 (2d6) Thunder damage, and if the target is a Large or smaller creature, it has the Prone condition. Half damage only.

Legendary Actions

Clamp.

Cthulhu makes an Eldritch Claw attack.

Fold Space.

cha DC 25, each creature and object that isn't being worn or carried in a 10-foot-radius Sphere centered on a point Cthulhu can see within 60 feet. 36 (8d8) Force damage, and the target is teleported to an unoccupied space within 60 feet of Cthulhu that is horizontal to it. Half damage only. Cthulhu can't take this action again until the start of its next turn.

Spellcasting

Spellcasting.

Cthulhu casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 25):

Raw data
{
  "ac": [
    19
  ],
  "cr": {
    "cr": "25",
    "xpLair": 90000
  },
  "hp": {
    "average": 385,
    "formula": "22d20 + 154"
  },
  "cha": 24,
  "con": 25,
  "dex": 12,
  "int": 28,
  "str": 29,
  "wis": 18,
  "name": "Cthulhu",
  "page": 106,
  "save": {
    "cha": "+15",
    "con": "+15",
    "wis": "+12"
  },
  "size": [
    "G"
  ],
  "type": "aberration",
  "bonus": [
    {
      "name": "Warp",
      "entries": [
        "Cthulhu teleports to an unoccupied space it can see within 120 feet, taking creatures it is grappling with it. Then each creature within 10 feet of the space it left is subjected to the following effect. {@actSave str} {@dc 25}. {@actSaveFail} 7 ({@damage 2d6}) Bludgeoning damage plus 7 ({@damage 2d6}) Thunder damage, and if the target is a Large or smaller creature, it has the {@condition Prone|XPHB} condition. {@actSaveSuccess} Half damage only."
      ]
    }
  ],
  "skill": {
    "insight": "+12",
    "perception": "+12",
    "persuasion": "+15"
  },
  "speed": {
    "swim": 60,
    "walk": 30,
    "climb": 30
  },
  "trait": [
    {
      "name": "Amphibious",
      "entries": [
        "Cthulhu can breathe air and water."
      ]
    },
    {
      "name": "Darklord Restoration",
      "entries": [
        "If Cthulhu dies, it revives with all its {@variantrule Hit Points|XPHB} in {@dice 1d10} weeks inside the Vault of Cthulhu."
      ]
    },
    {
      "name": "Impossible Geometry",
      "entries": [
        "Ground, air, and water in a 10-foot {@variantrule Emanation [Area of Effect]|XPHB|Emanation} originating from Cthulhu is {@variantrule Difficult Terrain|XPHB}. A creature that starts its turn in the {@variantrule Emanation [Area of Effect]|XPHB|Emanation} takes 7 ({@damage 2d6}) Bludgeoning damage."
      ]
    },
    {
      "name": "Legendary Resistance (4/Day, or 5/Day in Domain)",
      "entries": [
        "If Cthulhu fails a saving throw, it can choose to succeed instead."
      ]
    },
    {
      "name": "Magic Resistance",
      "entries": [
        "Cthulhu has {@variantrule Advantage|XPHB} on saving throws against spells and other magical effects."
      ]
    }
  ],
  "__prop": "monster",
  "action": [
    {
      "name": "Multiattack",
      "entries": [
        "Cthulhu makes three Eldritch Claw attacks and uses Spellcasting to cast {@spell Befuddlement|XPHB} if available or {@spell Mind Spike|XPHB} (level 4 version). It can replace one Eldritch Claw attack with a use of Tentacle."
      ]
    },
    {
      "name": "Eldritch Claw",
      "entries": [
        "{@atkr m} {@hit 17}, reach 10 ft. {@h}18 ({@damage 2d8 + 9}) Slashing damage plus 9 ({@damage 2d8}) Acid damage. If the target is a Large or smaller creature, it has the {@condition Grappled|XPHB} condition (escape {@dc 19}) from one of two limbs."
      ]
    },
    {
      "name": "Tentacle",
      "entries": [
        "{@actSave con} {@dc 25}, one creature {@condition Grappled|XPHB} by Cthulhu. {@actSaveFail} 21 ({@damage 6d6}) Acid damage plus 13 ({@damage 3d8}) Psychic damage. {@actSaveSuccess} Half damage. {@actSaveSuccessOrFail} The target's {@variantrule Hit Points|XPHB|Hit Point} maximum decreases by an amount equal to the Psychic damage taken, and Cthulhu regains {@variantrule Hit Points|XPHB} equal to that amount."
      ]
    }
  ],
  "resist": [
    "acid",
    "cold",
    "lightning",
    "psychic"
  ],
  "senses": [
    "Truesight 120 ft."
  ],
  "source": "RHW",
  "passive": 22,
  "hasFluff": true,
  "hasToken": true,
  "miscTags": [
    "AOE",
    "HPR",
    "MA",
    "RCH"
  ],
  "alignment": [
    "C",
    "E"
  ],
  "languages": [
    "all; telepathy 120 ft."
  ],
  "legendary": [
    {
      "name": "Clamp",
      "entries": [
        "Cthulhu makes an Eldritch Claw attack."
      ]
    },
    {
      "name": "Fold Space",
      "entries": [
        "{@actSave cha} {@dc 25}, each creature and object that isn't being worn or carried in a 10-foot-radius {@variantrule Sphere [Area of Effect]|XPHB|Sphere} centered on a point Cthulhu can see within 60 feet. {@actSaveFail} 36 ({@damage 8d8}) Force damage, and the target is teleported to an unoccupied space within 60 feet of Cthulhu that is horizontal to it. {@actSaveSuccess} Half damage only. {@actSaveSuccessOrFail} Cthulhu can't take this action again until the start of its next turn."
      ]
    }
  ],
  "senseTags": [
    "U"
  ],
  "traitTags": [
    "Amphibious",
    "Legendary Resistances",
    "Magic Resistance"
  ],
  "actionTags": [
    "Multiattack",
    "Tentacles"
  ],
  "damageTags": [
    "A",
    "B",
    "O",
    "S",
    "T",
    "Y"
  ],
  "initiative": {
    "proficiency": 1
  },
  "languageTags": [
    "TP",
    "XX"
  ],
  "spellcasting": [
    {
      "name": "Spellcasting",
      "type": "spellcasting",
      "will": [
        "{@spell Mind Spike|XPHB} (level 4 version)"
      ],
      "daily": {
        "1e": [
          "{@spell Befuddlement|XPHB}",
          "{@spell Plane Shift|XPHB} (self only)"
        ],
        "3e": [
          "{@spell Dream|XPHB}",
          "{@spell Geas|XPHB} (can target creatures through dreams)"
        ]
      },
      "ability": "int",
      "displayAs": "action",
      "headerEntries": [
        "Cthulhu casts one of the following spells, requiring no spell components and using Intelligence as the spellcasting ability (spell save {@dc 25}):"
      ]
    }
  ],
  "hasFluffImages": true,
  "legendaryGroup": {
    "name": "Cthulhu",
    "source": "RHW"
  },
  "conditionImmune": [
    "charmed",
    "exhaustion",
    "frightened",
    "paralyzed",
    "poisoned"
  ],
  "damageTagsSpell": [
    "Y"
  ],
  "isNamedCreature": true,
  "conditionInflict": [
    "grappled",
    "prone"
  ],
  "spellcastingTags": [
    "O"
  ],
  "savingThrowForced": [
    "charisma",
    "constitution",
    "strength"
  ],
  "conditionInflictSpell": [
    "charmed"
  ],
  "savingThrowForcedSpell": [
    "intelligence",
    "wisdom"
  ]
}