The Promised Reflection

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Huge Ooze (shapechanger), Neutral Evil

Armor Class 17 (natural armor)

Hit Points 225 (18d12+108)

Speed 20 ft. swim 40 ft.

STR 18 (+4)

DEX 10 (+0)

CON 22 (+6)

INT 16 (+3)

WIS 18 (+4)

CHA 21 (+5)

Saving Throws Con +11, Wis +9, Cha +10

Skills Insight +9, Stealth +5, Deception +10, Perception +9

Damage Resistances cold; psychic; bludgeoning, piercing, and slashing from nonmagical attacks

Damage Immunities acid, poison

Condition Immunities blinded, charmed, deafened, exhaustion, frightened, prone

Senses darkvision 120 ft., passive Perception 19

Languages Common, Deep Speech, telepathy 120 ft.

Challenge 15 (13,000 XP) Proficiency Bonus +5

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

Mirrorwater Form. The Promised Reflection can move through a space as narrow as 1 inch wide without squeezing. It can climb difficult surfaces, including upside down on ceilings, without making an ability check. It can occupy another creature's space and vice versa, and it can stop moving in a creature's space. A creature whose space it occupies has disadvantage on saving throws against the creature's abilities.

The Ledger of Longing. The Promised Reflection keeps the true names of those who have glimpsed its surface. It always knows the direction and distance to a creature whose name is in its ledger, provided that creature is on the same plane. The names of all creatures that see the Promised Reflection's surface for the first time are inscribed in the ledger.

A Better World. A creature that starts its turn within 30 feet of the Promised Reflection and can see its surface must succeed on a DC 18 Wisdom saving throw or become charmed until the start of its next turn. While charmed this way, the creature's speed is 0, and it can use its action only to reach toward, gaze into, or move closer to the Promised Reflection. The creature repeats the saving throw whenever it takes damage, ending the effect on a success. A creature that succeeds is immune to this trait for 24 hours.

Amorphous Existence. The Promised Reflection can see and hear through any reflective liquid connected to its body. It is immune to effects that would alter its form against its will.

Actions

Multiattack. The Promised Reflection makes three Drowning Grasp attacks. It can replace one attack with Drown the Reaching.

Drowning Grasp. Melee weapon Attack: +9 to hit, reach 15 ft., one target. Hit: 15 (2d10+4) bludgeoning damage, plus 7 (2d6) cold damage. If the target is Large or smaller, it must succeed on a DC 18 Strength saving throw or be pulled up to 10 feet toward the Promised Reflection and grappled. Until this grapple ends, the target is restrained and cannot breathe unless it can breathe water. The Promised Reflection can grapple up to three creatures at once.

Drown the Reaching. One creature within 30 feet that is charmed by A Better World or grappled by the Promised Reflection must make a DC 18 Constitution saving throw. On a failed save, the creature takes 36 (8d8) cold damage, is restrained until the end of its next turn, and begins drowning in impossible water. On a successful save, it takes half as much damage and is not restrained. A creature drowning this way can repeat the saving throw at the end of each of its turns, ending the effect on a success. If it fails three of these saves before succeeding, it falls unconscious for 1 minute or until it takes damage.

Rewrite the Face (Recharge 5-6). The Promised Reflection ripples outward in a 30-foot-radius wave. Each creature of its choice in that area must make a DC 18 Charisma saving throw. On a failed save, a creature takes 45 (10d8) psychic damage and is magically disguised, appearing to itself as the person it most wishes to become. The disguise lasts for 1 minute, and the creature is frightened of its own reflection for the duration. On a successful save, the creature takes half as much damage and suffers no other effect.

Liquefy the Boundary. The Promised Reflection teleports to an unoccupied space containing at least 1 pint of reflective liquid that it can sense within 120 feet. Each creature within 5 feet of the destination must succeed on a DC 18 Dexterity saving throw or be knocked prone and pulled into the liquid. A creature pulled this way is grappled by the Promised Reflection.

Reactions

The List Has Been Checked. When a creature whose name is in the ledger succeeds on a saving throw against the Promised Reflection, the creature can force that creature to reroll the save. The second result must be used.

Legendary Actions

The Promised Reflection 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 Promised Reflection regains spent legendary actions at the start of its turn.

Ripple. The Promised Reflection moves up to half its speed without provoking opportunity attacks.

Drowning Grasp. The Promised Reflection makes one Drowning Grasp attack.

Show the Answer (Costs 2 Actions). One creature within 60 feet that can see the Promised Reflection must succeed on a DC 18 Wisdom saving throw or use its reaction to move up to its speed toward the Promised Reflection by the safest available route. This movement can provoke opportunity attacks.

Sink Beneath (Costs 3 Actions). The Promised Reflection uses Drown the Reaching without expending an action, targeting one creature it is grappling.

Environment Underdark, Swamp, Urban

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"I saw my daughter alive in that water. Then the water learned my name." — Mara Venn, sole survivor of the Bellwether Flood

Lore & Description

Appearance

The Promised Reflection appears to be a broad, perfectly still puddle, usually no deeper than a finger's breadth and bordered by nothing but ordinary stone, mud, or dust. Its surface reflects a vivid world that does not exist: healed scars, restored homes, dead loved ones smiling in sunlight, and versions of onlookers untouched by grief. Beneath that impossible image, black-blue fluid churns with pale hands, drowned faces, and silver letters that form and reform into names. When threatened, the puddle rises into a towering, translucent shape whose edges constantly collapse back into liquid. Its interior is full of suspended doors, bridges, gardens, and other fragments of the life each victim most desires.

Behavior & Origins

The Promised Reflection is born where desperate wishes soak into cursed water: a battlefield well, a flooded shrine, or a mirror shattered over a mass grave. It does not merely feed on bodies; it feeds on the instant when hope becomes stronger than caution. Every person who looks into it is entered into the Ledger of Longing, and the creature patiently revisits those names through dreams, rain puddles, polished cups, and dark windows. The party is already on its list because someone in the group saw the puddle in a vision before reaching its lair. The creature wants the party to enter its reflected world willingly, where it can preserve their ideal selves as permanent inhabitants.

Running The Promised Reflection

Tactics

The Promised Reflection begins combat by using A Better World to freeze the most emotionally vulnerable character, then uses Drowning Grasp to pull that character into the puddle while remaining spread across the battlefield. It uses Liquefy the Boundary to appear beneath isolated targets and spends legendary actions on Show the Answer to make victims approach it. When reduced below half its hit points, it uses Rewrite the Face and focuses on creatures already grappled; it fights to the death if any member of the party remains in its ledger, but flees through reflective water if everyone escapes its range and no one is restrained.

DM Tips

Telegraph the danger with puddles that reflect absent landmarks, footprints appearing beneath the water, and written names briefly surfacing in silver letters.
Give each character a distinct glimpse of a personal better world, and describe the creature's telepathy as the voice of someone the character trusts.
The puddle's surface can be covered with opaque material, reducing the reach of A Better World and preventing creatures from being entered into the ledger while it is fully obscured.
For a weaker party, remove the cold damage from Drowning Grasp and reduce all save DCs to 16; for a stronger party, allow the creature to use Drown the Reaching as a legendary action for 2 actions instead of 3.

Loot

The Silver Ledger — A waterlogged strip of black glass engraved with the names of everyone the creature has ever drowned. A name can be scratched away with diamond dust, ending the creature's ability to track that person.
Vial of Impossible Water — A sealed vial containing a reflection of the drinker's greatest desire. Drinking it grants advantage on one saving throw against being charmed, but afterward the drinker dreams of the Promised Reflection calling their name.
The Unbroken Door — A tiny silver door recovered from the puddle's depths. Set into a wall and opened with a creature's true name, it reveals a fleeting view of a place that person considers home.

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Generation Info

Original prompt:
"CR 15: A puddle that reflects a better world and drowns those who reach for it. It keeps a list, and the party is on it."

Created: Sep 16, 2026
Modified: Oct 26, 2026

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