Forum:Mercuite, The Black Star

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"This article contains spoilers; my players be careful what you read. - Mirror Zero (contribs) • Fan Fiction (Compendium • Locations • Story) 13:16, July 20, 2025 (EDT)"

Main

Mercuite, The Black Star
Biographical information
Other name(s):	Disciple of Envy Prince of Light (formerly)
Homeworld:	Unknown
Died:	The Europan Pyramid (alternate reality) (Formerly)
Species:	Astral Elf/Tiefling (Formerly) Eldritch Horror (made by the Witness)
Gender:	Male
Political and military information
Affiliation:	Disciples of the Witness
Rank:	Disciple
Notable info:	Brother of Nessius, The Far Gone (before death) Psychic Terror (post revival)

Boss

Boss (The following contains spoilers)

Mercuite, Vessel of the Witness Biographical information Faction: Disciples of the Witness Rank: Ultra Bane-Empowered Gender: Male Combat information Mission: The Lichen Resolution (Briefly) Last Words of Envy (Briefly, throughout) Strike: Denouncement (Briefly, at end) Raid: Singularity's Horizon (Final Boss) Weapon(s): / Dark-Eater Abilities: High Durability Rapid Movement Summon Taken Summon Dread Abyssal Cleave Psionic Entropy Witness's Shatter Psionic Quake Wrathful Disarray / Unraveled Crystals Avalanche Wave (Cascade Bane) Immunity (outside Raid) Psychic Blink Psychic Tendrils Necrotic Touch Singularity Convergence Singularity Collapse Flash-Strike Regeneration Unyielding Core Brief Immunity (Raid) Summon Geists Suns of Lubrae

Mercuite, The Black Star is a Disciple of the Witness. He like his sister is a powerful psionic entity. However having crossed the wrong person he was killed in a completely one-sided fight between him and the most powerful of the Curators; Thirhe, Lord of Vengeance. As things stand now, his body lies dead to rot within his pyramid which just so happens to be the alternate reality version of the The Europan Pyramid.

Legacy

Long after his presumed death, Mercuite would begin to resurface as but whispers on the songs of the Taken. Then among some of the Dread... culiminating into a climax by the death of Malefor, The Sky Eater. This event would be the catalyst to reawaken the now supposedly resurrected Disciple.

Spoiler warning: Plot and/or ending details follow.

It would be revealed that Mercuite was only brought back by The Witness to serve as a vessel for its first big move to prepare the system for its arrival. So, there would be no resistance.

Spoilers end here.

Gameplay

Raid Mechanics (The following contains spoilers, players do not read this)

Spoiler warning: Plot and/or ending details follow. "This gameplay was written up by Chat GPT, I approve of this wording as I requested it - User:Mirror Zero " Mercuite, Vessel of the Witness is the final boss encounter of Singularity’s Horizon. The fight takes place within the core chamber of the Velo Umbra’s Black Hole Generator, with the singularity visibly reacting to each phase of the battle. Mercuite wields his glaive known Dark-Eater which deals / damage and begins the encounter under brief immunity, broken only through Obelisk manipulation. Arena Layout Three Obelisks Left Right Central (always rotated last) The Black Hole Generator dominates the arena and destabilizes as mechanics progress. Primary Mechanic: Obelisk Rotation Ultra Taken Wyverns, designated Salvation’s Final Judgement, periodically spawn. These Wyverns lock Obelisks, preventing rotation. Slaying a Wyvern unlocks its associated Obelisk. To initiate damage: All three Obelisks must be rotated The central Obelisk must always be rotated last Damage is always dealt from the central Obelisk Rotating all Obelisks removes Mercuite’s shield and begins a damage phase. Damage Phases The fireteam is limited to three damage phases. Failure to reduce Mercuite to Final Stand health within three phases causes Final Stand to begin early. Mercuite becomes increasingly aggressive between phases, using the following abilities alongside its main ranged attack / Unraveled Crystals: Psionic Quake Witness’s Shatter Psychic Blink To name a few Final Stand — Absolute Faith At 25% health, or after the third damage phase, Mercuite enters Final Stand. Mercuite halts all defensive behavior The Witness speaks through him, his eyes burning with resonant orange light The Black Hole Generator enters irreversible overload Final Stand Rules: The party has 2 rounds to defeat Mercuite If the timer expires, the fireteam wipes Melee attacks against Mercuite extend the timer by 1 round Timer extensions are capped at 7 total rounds Once capped, melee attacks deal damage but no longer extend the timer The final 25% of Mercuite’s health must be depleted before the timer ends This phase rewards aggressive, high-risk play while punishing hesitation. Spoilers end here.