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The Bastion of Twilight

Cho'gall Guide

Cho'gall in The Bastion of Twilight, quoted from the Adventure Guide. Database holds the raw abilities and the full loot table.

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30-second TL;DR

Adventure Guide says

  • Stages named in the Adventure Guide: Corrupted Blood, Stage One: Chaos Comes!, Stage Two: Come, Infinite Night!.

Encounter phases

Adventure Guide says

  1. Corrupted Blood Exposure to several of Cho'gall's abilities increases a player's Corruption level.
  2. Stage One: Chaos Comes!
  3. Stage Two: Come, Infinite Night! When Cho'gall reaches 25% health, he calls upon the full powers of the Old Gods. He absorbs the dark energies of any remaining Corrupting Adherents and pools of Spilled Blood of the Old God, then transforms himself into a twisted creature.

Normal, Heroic, and Mythic

Adventure Guide says

Only sentences the Adventure Guide itself marks as a difficulty change. We do not invent extra Heroic or Mythic strategy.

  • On Heroic difficulty Cho'gall gains one additional stack of Flaming Destruction for each 10% health remaining on the elemental when it is absorbed.
  • On Heroic Difficulty Cho'gall gains one stack of Empowered Shadows for each 10% health remaining on the elemental when it is absorbed.

Boss abilities

AbilityAdventure GuideNotes
Corruption: AcceleratedWhen Corrupted Blood reaches 25%, a player gains Corruption: Accelerated, which rapidly increases their Corruption level.
Corruption: SicknessWhen Corrupted Blood reaches 50%, players periodically become violently ill. Players hit by this vile spew suffer increased Corruption.
Corruption: MalformationWhen Corrupted Blood reaches 75%, the corruption is so thorough that a tentacle Malformation erupts from a player's back.
Corruption: AbsoluteWhen Corrupted Blood reaches 100%, players fully transform into faceless horrors.
ConversionCho'gall beckons to the weak of mind, causing random players to abandon their loyalties and begin to Worship Cho'gall.
Twisted DevotionThis effect stacks.
Fury of Cho'gall
Flame's OrdersCho'gall calls forth a Fire elemental and absorbs the elemental into his Twilight Hammer, empowering it with Flaming Destruction. On Heroic difficulty Cho'gall gains one additional stack of Flaming Destruction for each 10% health remaining on the elemental when it is absorbed.
Flaming Destruction
Shadow's OrdersCho'gall calls forth a Shadow elemental and absorbs the elemental into his Twilight Hammer, imbuing it with Empowered Shadows. On Heroic Difficulty Cho'gall gains one stack of Empowered Shadows for each 10% health remaining on the elemental when it is absorbed.
Empowered Shadows
Summon Corrupting AdherentCho'gall summons a Corrupting Adherent from one of twilight portals at the sides of the room. On 25-player Heroic difficulty, Cho'gall activates both portals, summoning two Corrupting Adherents simultaneously.
Fester BloodCho'gall festers the blood of all Corrupting Adherents, causing pools of Spilled Blood of the Old God to form into animated oozes. Fester Blood also causes the dark blood of any living Corrupting Adherents to boil, causing the Festering Blood effect.
Festering BloodPlayers damaged by this ability will gain Corruption.
Corruption of the Old God
Darkened CreationsCho'gall causes tentacles to erupt from inky clouds on the ground.

Loot

Every name is a TheWoWDB item page. Hover the row for the first-party tooltip.

Battleplate of the ApocalypseNH10P25PBattleplate of the Apocalypse10P H25P HCoil of Ten-Thousand ScreamsNH10P25PCoil of Ten-Thousand Screams10P H25P HFall of MortalityNH10P25PFall of Mortality10P H25P HHands of the Twilight CouncilNH10P25PHands of the Twilight Council10P H25P HHelm of Maddening WhispersNH10P25PHelm of Maddening Whispers10P H25P HKilt of the Forgotten BattleNH10P25PKilt of the Forgotten Battle10P H25P HMantle of the Forlorn ConquerorNH10P25PMantle of the Forlorn ProtectorNH10P25PMantle of the Forlorn VanquisherNH10P25PMembrane of C'ThunNH10P25PMembrane of C'Thun10P H25P HShackles of the End of DaysNH10P25PShackles of the End of Days10P H25P HShalug'doom, the Axe of UnmakingNH10P25PShalug'doom, the Axe of Unmaking10P H25P HShoulders of the Forlorn Conqueror10P H25P HShoulders of the Forlorn Protector10P H25P HShoulders of the Forlorn Vanquisher10P H25P HSignet of the Fifth CircleNH10P25PSignet of the Fifth Circle10P H25P HTreads of Hideous TransformationNH10P25PTreads of Hideous Transformation10P H25P HTwilight's HammerNH10P25PTwilight's Hammer10P H25P HUhn'agh Fash, the Darkest BetrayalNH10P25PUhn'agh Fash, the Darkest Betrayal10P H25P HTwilight Summoning Portal

Mounts, toys, achievements, transmog

Only rows the journal loot table or an achievement title can prove for this encounter.

Achievements

Heroic: Ascendant Council · Heroic: Cho'gall · Heroic: Halfus Wyrmbreaker · Heroic: Sinestra · The Bastion of Twilight

Entrance and instance

The Bastion of Twilight is a raid in the Adventure Guide. See the The Bastion of Twilight database page for the raw journal, map, and loot grid. This guide does not invent coordinates or a walking path.

Halfus Wyrmbreaker
Theralion and Valiona
Ascendant Council
Sinestra

Player strategy

This page quotes the Adventure Guide. It does not add player strategy such as positioning, assignments, stack or spread calls, or cooldown timings unless that sentence is already in the journal.

Questions

What does the Adventure Guide say about Cho'gall?

Stages named in the Adventure Guide: Corrupted Blood, Stage One: Chaos Comes!, Stage Two: Come, Infinite Night!.

What does Cho'gall drop?

The Adventure Guide lists 33 drops. Each name links to its TheWoWDB item page. The full table also lives on the The Bastion of Twilight database page.

Does Cho'gall change on Heroic or Mythic?

Yes. The Adventure Guide adds difficulty sentences on the abilities that change; those sentences are collected in the difficulty section. We do not invent additional Heroic or Mythic strategy.

Where does this guide's text come from?

Quoted Adventure Guide sections come from TheWoWDB's retail datamine (client build 12.1.0.69587, ingested 2026-09-01). Player strategy such as positioning, assignments, and cooldown timings is omitted unless that sentence is already in the journal.

Source and build

This page quotes the Adventure Guide. It does not add player strategy such as positioning, assignments, stack or spread calls, or cooldown timings unless that sentence is already in the journal. Quoted sections come from TheWoWDB Adventure Guide datamine (client build 12.1.0.69587, ingested 2026-09-01). Ability names link to first-party spell pages. When a newer retail build is ingested, this page updates with it.