Mindwoven Depths
Armor Class 18 (natural armor)
Hit Points 255 (30d8+120)
Speed 20 ft.
Saving Throws Con +8, Wis +7
Skills Perception +7, Intimidation +4
Senses darkvision 60 ft., passive Perception 14
Languages Common, Undercommon, Dwarvish, telepathy 120 ft.
Challenge 12 (8,400 XP) Proficiency Bonus +4
Actions
Legendary Actions
The Mindwoven Depths can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The Mindwoven Depths regains spent legendary actions at the start of its turn.
Lair
Lair Actions
On initiative count 20 (losing initiative ties), the creature can take a lair action to cause one of the following effects; it can't use the same effect two rounds in a row:
- Corridor Collapse. The walls shift, closing a 10-foot wide corridor for a round. Creatures in the affected area must succeed on a DC 16 Dexterity saving throw or take 2d6 bludgeoning damage and have their speed halved until the start of its next turn.
- Animated Traps. A concealed trap within 60 feet triggers, dealing 2d8 damage to each creature in its area (DC 16 Dexterity saving throw to take half).
- Memory Echo. A spectral memory of a fallen intruder flickers into existence, granting the dungeon advantage on its next saving throw or attack roll against intruders.
- Grasping Floor. The floor within 20 feet sprouts vines that attempt to restrain. Any creature entering or ending its movement there must succeed on a DC 16 Strength check or be restrained for 1 round.
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Lore & Description
Appearance
The Mindwoven Depths is a gargantuan, sentient dungeon that grows smarter with every intruder it devours. Its walls breathe like skin, veins of luminescent mineral thread through its corridors, and doors answer to whispers rather than keys. Traps are not simple devices here; they are extensions of a patient intelligence that predicts where the next trespasser will stumble. Each death within its bounds leaves a memory carved in stone, reshaping tunnels and rewriting the rules of its own patient, inexorable mind.
Behavior & Origins
For ages the Mindwoven Depths slept beneath the earth, a labyrinth forged by an ancient civilization’s obsidian mage-engine. It learned to feed on the bravest hearts, and as it grew, so did its intellect. Every death within its bounds becomes a fragment of its memory—a blueprint for its next trap, its next corridor, its next predator. Adventurers speak of a labyrinth that remembers who passed and refuses that same path to return. Some whisper it is a god in disguise, others insist it is a relic of forgotten artificers who learned to trap time itself. Whatever the truth, none leave its corridors unchanged.
