The Epoch Rewriter

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Huge Monstrosity (time-manipulator, world-shaper), Lawful Evil

Armor Class 19 (natural armor)

Hit Points 252 (24d12+96)

Speed 30 ft. fly 40 ft.

STR 20 (+5)

DEX 14 (+2)

CON 18 (+4)

INT 12 (+1)

WIS 12 (+1)

CHA 8 (-1)

Saving Throws Con +9, Wis +6

Skills Athletics +9, Perception +6

Condition Immunities charmed, frightened

Senses darkvision 60 ft., passive Perception 16

Languages Common, Celestial

Challenge 17 (18,000 XP) Proficiency Bonus +5

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

Magic Resistance. The creature has advantage on saving throws against spells and other magical effects.

Keen Senses. The creature has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Temporal Manipulator. The Epoch Rewriter can twist time around itself, giving it advantage on attack rolls and saving throws once per round after it uses a legendary action.

Actions

Multiattack. The Epoch Rewriter makes three attacks: one Bite, one Claw, and one Tail.

Bite. Melee weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 30 (4d10+8) piercing damage. The bite gnaws through flesh and time alike.

Claw. Melee weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 19 (3d8+6) slashing damage. The claws carve temporal fractures in the air.

Tail. Melee weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 19 (3d8+6) bludgeoning damage. A sweeping tail strike that can knock a foe off balance in time.

World Reset (Death Trigger) (Recharge 5-6). If the Epoch Rewriter would be reduced to 0 hit points, it instead triggers a World Reset: the entire battlefield rewinds to the moment just before the encounter began, all HP and conditions are restored, initiative order resets, and the Epoch Rewriter regains full health. The ritual leaves a lingering time-warp in the area for 1d6 days, during which attempts to permanently destroy the creature fail unless the attackers have destroyed its anchor: the Hourglass of Aeons hidden in its lair.

Legendary Actions

The Epoch Rewriter 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 Epoch Rewriter regains spent legendary actions at the start of its turn.

Detect. The creature makes a Wisdom (Perception) check.

Time Ripple. The Rewriter targets one creature it can see within 60 feet. The target must succeed on a DC 19 Wisdom saving throw or have its next action rolled back to the state it was in at the end of the previous turn.

Hourglass Swing (Costs 2 Actions). The Rewriter makes a bite attack. If it hits, the target takes the bite damage plus 9 (3d6) force damage, and the target's speed is reduced by 10 feet until the end of its next 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:

Chronal Echo. At the start of the Rewriter's turn, a chronal echo fills a 60-foot radius. All nonmagical light within the area dims, and any creature that starts its turn in the area must succeed on a DC 18 Dexterity saving throw or be moved 10 feet in a random direction.
Hourglass Collapse. The sand in the Hourglass of Aeons within 60 feet swirls violently. Each creature in the area must succeed on a DC 18 Constitution saving throw or have its speed halved until the start of the Rewriter's next turn.
Self-Repair Burst. The Rewriter regains 20 hit points (to a maximum of its HP). This does not count against its legendary actions.

Regional Effects

The region containing the creature's lair is warped by its magic, creating the following effects:

Within 6 miles of the lair, clocks and hourglasses run backward for 1 minute each hour, causing time-based effects to reverse or reset.
Spectral echoes of past battles haunt the area, giving advantage to the Rewriter on checks related to time or history.
The Hourglass of Aeons, a core anchor of the Rewriter's power, hums with golden light; destroying it requires a ritual performed in the creature's lair and takes 1 hour per attempt.

If the creature dies and the World Reset occurs, these regional effects fade over the course of 1d10 days unless the Hourglass of Aeons is restored to its pedestal.

Environment Forest, Mountain

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Lore & Description

Appearance

A towering, humanoid silhouette cloaked in shifting obsidian skin etched with runes that resemble spinning hourglasses. Its eyes are twin voids that swallow light, and clockwork gears click softly beneath its ribcage as time itself seems to bend around it. When it speaks, its voice is a whisper of winds through an empty timetable, promising renewal and warning of consequences if its peace is broken.

Behavior & Origins

Long ago, a council of chronomancers sought to mend tragedies by weaving timelines back together. They failed, and from the fracture crawled the Epoch Rewriter—a being that feeds on moments lost and resets entire worlds when slain. It haunts ruins and high peaks, isolating civilizations who dare tamper with fate. The only way to permanently stop it is to destroy the Hourglass of Aeons, the temporal anchor buried within its lair. Until then, death is only a temporary pause—the world itself will erase the death and begin anew, as if nothing happened.

Generation Info

Original prompt:
"A monster that resets the world when slain."

Created: Feb 2, 2026
Modified: May 22, 2026