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QuestsupportingSide mission

Defeat the Myconid Sovereign

A choice-driven Act 1 quest in which Sovereign Glut asks you to overthrow Sovereign Spaw inside the Ebonlake Grotto, turning the myconid colony against you.

RoleSupporting side quest centered on the conflict between Sovereign Spaw and Sovereign Glut.
StatusAvailable in Baldur's Gate 3
Importancesupporting
RewardThe King-Bringer title and a different set of rewards when Glut becomes Sovereign
  • Quest typeSide mission
  • ActAct 1
  • RegionUnderdark
  • LocationEbonlake Grotto
  • Primary conflictSovereign Glut versus Sovereign Spaw
  • Hostile outcomeMyconids defend Spaw
  • Route impactUsually locks the opposing sovereign path
  • Named outcomeKing-Bringer

The source material does not establish a mission number, estimated completion time, enemy count, boss statistics, or itemized reward list.

Key takeawaysSpoilers

The important decision is whether to support the displaced challenger or the established sovereign.

  • Glut is the instigator Sovereign Glut asks for help usurping Sovereign Spaw, making the quest an optional power struggle rather than a routine colony-clearing objective.
  • The whole colony can turn hostile Attacking Spaw inside Ebonlake Grotto causes other myconids in the colony to defend him.
  • The two routes are mutually restrictive Supporting one sovereign generally locks out the other sovereign's narrative path and rewards.
  • The reward identity changes with the outcome Helping Glut become the new Sovereign earns the title King-Bringer and a different set of rewards.

Defeat the Myconid SovereignSpoilers

Defeat the Myconid Sovereign is the hostile resolution to the conflict between Sovereign Glut and Sovereign Spaw in the Underdark.

This quest concerns a leadership dispute within the myconid colony. Sovereign Glut is a displaced myconid who asks the player to help him usurp Sovereign Spaw, the colony's current leader. Accepting that request changes the encounter from a conversation about the colony's problems into a direct attack on its established sovereign.

The confrontation takes place inside the Ebonlake Grotto. The objective is not to defeat a separate invading force or protect the colony from outside attackers; it is to attack and kill Sovereign Spaw. Once combat begins, other myconids in the colony become hostile and defend Spaw, so the decision affects the wider encounter rather than isolating the target from the rest of the settlement.

This route belongs to the Avenge Glut's Circle questline and represents one side of a larger choice in Act 1. Sovereign Spaw is described as the hospitable leader who offers rewards for defending the circle from Duergar aggressors, while helping Glut replace him leads to the King-Bringer title and a different reward path. Choosing between them generally prevents access to the other sovereign's narrative route and rewards.

Where this sits

Myconid colonyA leadership dispute develops within the colony.
Sovereign Glut's requestThe displaced myconid asks for help against Spaw.
Ebonlake Grotto confrontationThe chosen overthrow is carried out here.
  1. 1Avenge Glut's CircleThis quest is identified as part of the questline.
  2. ●Defeat the Myconid SovereignThe current page covers the route against Sovereign Spaw.

This quest is a supporting Act 1 decision in the Underdark, not an independently numbered main-story mission.

Requirements

The verified prerequisite is accepting Sovereign Glut's proposal to help him challenge Sovereign Spaw.

  • RequiredSpeak with Sovereign GlutThe quest route begins with the displaced myconid's request to help him usurp the current leader.
  • RequiredAccept Glut's side of the disputeThe attack on Sovereign Spaw follows from agreeing to Glut's plan.
  • RequiredReach Ebonlake GrottoThe source identifies this grotto as the site of the required confrontation.
  • RecommendedPrepare for colony hostilityOther myconids will defend Spaw once the attack begins, so the encounter cannot be treated as a private duel.

ObjectivesSpoilers

  1. Agree to help Sovereign Glut usurp Sovereign SpawThis commits the player to Glut's challenge against the current leader.
  2. Attack Sovereign Spaw in Ebonlake GrottoThe confrontation must occur within the myconid colony's grotto.
  3. Kill Sovereign SpawThe hostile route is resolved by defeating Spaw rather than by defending him.
  4. Handle the consequences of the leadership changeThe other myconids become hostile during the combat, and the outcome changes which sovereign's rewards remain available.

WalkthroughSpoilers

  1. 01

    Speak with Sovereign Glut

    Find Sovereign Glut in the myconid colony

    Locate Sovereign Glut and listen to his position in the colony's leadership dispute. He is a displaced myconid, and his request is the point at which this route becomes available.

    Location: Myconid colony

  2. 02

    Learn what Sovereign Glut wants

    Hear Glut's proposal

    Glut asks you to help him usurp Sovereign Spaw, who currently leads the colony. Treat this conversation as a major route decision: accepting it directs the quest toward Spaw rather than toward preserving the existing leadership.

    Location: Myconid colony

  3. 03

    Accept Sovereign Glut's plan

    Commit to the overthrow

    Agree to help Glut before proceeding to the confrontation. The supplied material does not verify an alternate dialogue requirement, so the reliable route is simply to accept the displaced sovereign's request and follow the resulting objective.

    Location: Myconid colony

    Watch outChoosing Glut's plan generally locks out Sovereign Spaw's narrative path and rewards.

  4. 04

    Reach the confrontation site

    Travel to Ebonlake Grotto

    Proceed to Ebonlake Grotto, the location specified for the attack on Sovereign Spaw. Make your preparations before beginning the confrontation because the colony's myconids will become defenders once hostilities start.

    Location: Ebonlake Grotto

    TipDo not assume that Spaw can be fought without affecting the surrounding colony.

  5. 05

    Start the overthrow

    Attack Sovereign Spaw

    Begin the hostile encounter by attacking Sovereign Spaw inside Ebonlake Grotto. This is the point where the peaceful relationship with the established leader ends and the surrounding myconids turn against the attacking party.

    Location: Ebonlake Grotto

    Watch outAttacking Spaw makes other myconids in the colony hostile.

  6. 06

    Survive the colony's response

    Defeat the defending myconids

    Continue through the combat after the colony joins Spaw's defense. The supplied sources confirm that other myconids participate, but do not establish a reliable enemy count, named variants, formation, or attack order.

    Location: Ebonlake Grotto

  7. 07

    Defeat Sovereign Spaw

    Kill Sovereign Spaw

    Finish the encounter by defeating the current sovereign. The quest's hostile resolution is specifically tied to killing Spaw, not merely starting the attack or forcing the colony to become hostile.

    Location: Ebonlake Grotto

    Checkpoint
  8. 08

    Complete the leadership change

    Accept the Glut-aligned outcome

    After Spaw has been killed, the quest resolves in favor of the challenger. Helping Glut become the new Sovereign earns the title King-Bringer and gives access to a different set of rewards from the Spaw-aligned route.

    Location: Myconid colony

    Watch outThe Glut-aligned outcome generally prevents access to Sovereign Spaw's narrative path and rewards.

    Missable

Mission mechanicsSpoilers

The central mechanic is allegiance rather than a puzzle or traversal challenge. Sovereign Glut's request changes the player's relationship with Sovereign Spaw, and the decision has settlement-wide consequences once the attack begins.

This is not presented as a one-on-one boss encounter. Spaw is defended by other myconids in the colony, meaning the player must account for a wider hostile response inside Ebonlake Grotto. The sources do not verify specific enemy abilities, combat phases, resistances, terrain interactions, or target priorities, so those details should not be assumed.

The quest also uses reward exclusivity as a consequence. Supporting Spaw preserves his route, including access to a secret treasure room after reporting Glut's betrayal, while supporting Glut produces the King-Bringer title and a different reward set. These outcomes are generally locked against one another.

What works and what does not

Strengths

  • The quest presents a clear conflict between an established leader and a displaced challenger.
  • The decision has consequences beyond a single dialogue exchange because the colony joins Spaw's defense.
  • The two routes provide distinct narrative and reward outcomes.

Weaknesses

  • The Glut-aligned route generally prevents access to Sovereign Spaw's story and rewards on the same playthrough.
  • The attack converts the myconid colony into a hostile combat encounter, removing the peaceful context associated with Spaw.
  • The supplied material does not provide an itemized list of the different rewards, making precise loot planning impossible from the verified facts alone.

Best uses

  • Choose this route when pursuing Sovereign Glut's leadership challenge and the King-Bringer outcome.
  • Choose the opposing route instead when preserving Spaw's hospitality, defensive-reward path, and secret treasure-room access is more important.

PhasesSpoilers

  1. 1

    Leadership confrontation

    Starts: Accepting Sovereign Glut's request and attacking Sovereign Spaw

    Not specified in the supplied sources

    The encounter begins as an overthrow attempt against the current myconid leader in Ebonlake Grotto.

    • Prepare for the wider colony to become hostile rather than planning for a private duel.
  2. 2

    Colony defense

    Starts: Hostilities begin against Sovereign Spaw

    Not specified in the supplied sources

    Other myconids defend Spaw during the combat encounter.

    • The sources do not verify enemy counts, named combat abilities, or a reliable phase order.
  3. 3

    Leadership change

    Starts: Sovereign Spaw is killed

    Not applicable

    The hostile route concludes with Glut becoming the new Sovereign and the King-Bringer title becoming the identified outcome.

    • Remember that the resulting reward path generally excludes the opposing sovereign's route.

Boss encounterSpoilers

  • Location
    Ebonlake Grotto
  • Health
    Not specified in the supplied sources

Sovereign Spaw cannot be treated as an isolated target because other myconids in the colony turn hostile and defend him. The verified route is to initiate the attack inside the grotto, survive the colony's response, and kill Spaw; detailed combat tactics, resistances, and attack patterns are not established by the source pack.

Rewards

  • King-Bringer title when helping Glut become the new Sovereign
  • A different set of rewards from the Sovereign Spaw-aligned route is exchanged for this outcome

Choices and consequencesSpoilers

  • Help Sovereign Glut usurp Sovereign Spaw

    You must attack and kill Spaw in Ebonlake Grotto. The myconids defend Spaw, and helping Glut become the new Sovereign earns the King-Bringer title and a different reward set.

    Spoiler
  • Side with Sovereign Spaw by reporting Glut's betrayal

    This preserves Spaw's route and allows access to a secret treasure room. It generally locks out Glut's narrative path and rewards.

    Spoiler
  • Choose one sovereign and proceed

    The two routes are generally mutually exclusive, so selecting one normally means losing access to the other's narrative path and rewards.

    Spoiler

Checklist

  • Speak with Sovereign GlutThis is the verified starting point for the overthrow route.
  • Decide whether Glut's challenge is worth losing Spaw's routeThe sovereign choice generally locks out the opposing narrative path and rewards.
  • Reach Ebonlake Grotto before starting the attackThe confrontation with Spaw occurs there.
  • Expect the other myconids to defend SpawThe colony becomes hostile during this combat encounter.
  • Defeat Sovereign SpawKilling Spaw is the required hostile resolution.
  • Confirm the Glut-aligned outcomeThe identified outcome includes the King-Bringer title and a different reward set.
  • Record the choice before committing if you want to compare both routesThe supplied facts establish route lockout, but do not prescribe a particular save-management method.Optional

RewardsSpoilers

  • King-Bringer
    The title earned when helping Sovereign Glut become the new Sovereign.
  • Glut-aligned reward set
    A different set of rewards is associated with helping Glut replace Spaw, but the supplied sources do not itemize it.
  • Sovereign Spaw-aligned rewards
    The opposing route offers a separate reward path and, when Glut's betrayal is reported, access to a secret treasure room.

AftermathSpoilers

The sovereign choice changes the reward path

Helping Glut become the new Sovereign earns the King-Bringer title and a different set of rewards. Reporting Glut's betrayal and siding with Spaw instead allows access to a secret treasure room, but choosing one sovereign generally locks out the other sovereign's narrative path and rewards.

Trivia

  • The quest is framed around a succession dispute between a displaced myconid and an established leader.
  • The hostile outcome takes place in Ebonlake Grotto rather than at a separate arena.
  • Sovereign Spaw's route is associated with protecting the myconid circle from Duergar aggressors.
  • The King-Bringer title is specifically tied to helping Glut become the new Sovereign.
  • The choice occurs during Act 1 in the Underdark.

Sources

Relationships

characters

  • Sovereign GlutQuest giverThe displaced myconid who asks for help usurping Sovereign Spaw.
  • Sovereign SpawTargetThe current myconid leader attacked in the hostile resolution.

locations

  • Ebonlake GrottoEncounter locationThe grotto where the attack on Sovereign Spaw takes place.

factions

  • DuergarAggressorsAggressors connected to Sovereign Spaw's defensive reward offer.