Phase Spider Matriarch

Predator of the Ethereal Plane

Level 4

phase spider matriarch bosses bg3 wiki guide 300px
Location Whispering Depths
Act Act 1
Quests Search the Cellar

Phase Spider Matriarch is a Boss in Baldur's Gate 3. Phase Spider Matriarch is a massive Phase Spider that resides in the Whispering Depths. Bosses in BG3 are powerful enemies that have increased health and pose a bigger challenge for players.


Where to find Phase Spider Matriarch

Act 1


Phase Spider Matriarch Quests


Phase Spider Matriarch Dialogue Options

  • Players can't interact with the Phase Spider Matriarch, as soon as they are spotted, the battle will start.



Phase Spider Matriarch Boss Guide

Phase Spider Matriarch Boss Tips

Phase Spider Matriarch lurks within its lair accompanied by two Phase Spider. Their movement range is massive since they can teleport, so be aware of that when facing them. The other thing you have to be aware of are the three groups of spider eggs lying around the lair. Try to destroy as many as possible before initiating combat with the Phase Spider Matriarch.

Once you initiate combat, the Phase Spider Matriarch, will head to one of the three groups to hatch them instantaneously. This action will create 6 Phase Spiderling. They are not dangerous on their own, in groups they can hinder your chances of survival. 

When you lower its health to 50%, the Phase Spider Matriarch will cast  Spider Queen's Wrath on itself. Increasing its Strength by 2, but lowering its Armour Class by 1.

Phase Spider Matriarch General Information

race icon baldurs gate 3 wiki guideRace: Phase Spider (Monstrosity)
hp icon baldurs gate 3 wiki guideHealth: 125
armorp icon baldurs gate 3 wiki guideAC: 15
movement speed icon baldurs gate 3 wiki guideBase speed: 9m 
size icon baldurs gate 3 wiki guideSize: Large
weight icon baldurs gate 3 wiki guideWeight: 250kg.
attitude icon baldurs gate 3 wiki guideAttitude: 0

Phase Spider Matriarch Passive Features

attack of opportunity reaction bg3 wiki guide 45pxAttack of Opportunity:

  • Automatically attack an enemy moving out of your reach. This uses a Reaction. 

Web Walker:

  • Isn't slowed down by web surfaces, and can't be Enwebbed by them.

darkvision spell baldursgate3 wiki guide 150px 2Darkvision

Phase Spider Matriarch Abilities

strength ability baldursgate3 wiki guide 75pxStrength: 19
dexterity ability baldursgate3 wiki guide 75pxDexterity: 16
constitution ability baldursgate3 wiki guide 75pxConstitution: 14 
intelligence ability baldursgate3 wiki guide 75pxIntelligence: 6
wisdom ability baldursgate3 wiki guide 75pxWisdom: 12
charisma ability baldursgate3 wiki guide 75pxCharisma: 6

  • Proficiency Bonus: +2
  • Initiative: +3

Attacks & Spells

  • Venomous Discharge: Shoots a venom missile that can damage multiple targets.
  • Ethereal Jaunt: Teleports the user to another location.
  • Venomous Bite: Attacks with its jaws.
  • Venomous Bite(Multiattack): Attacks with its jaws twice.
  • Spider Queen's Wrath: Creature is enraged! Strength increased by 2, Armour Class reduced by 1. (After lowering 50% of its health).

Phase Spider Matriarch Resistances

damage slashing icon bg3 wiki guideSlashing: Normal
damage piercing icon bg3 wiki guidePiercing: Normal
damage blunt icoin bg3 wiki guideBludgeoning: Normal
damage fire icon bg3 wiki guideFire: Normal
damage lightning icon bg3 wiki guideLightning: Normal
damage psychic icon bg3 wiki guidePsychic: Normal
damage poison icon bg3 wiki guidePoison: Resistant

Phase Spider Matriarch Rewards


Notes and Tips

  • Sleep spell works good with the spiderlings.
  • You can destroy the other spiderling eggs to prevent her from spawning more spiderlings. The ones on the far platform from her are fairly easy to sneak to without detecting - be sure to equip the Spiderstep Boots on the person sneaking to prevent detection! She will still be able to hatch the ones she starts by, but it makes things a lot easier in the last half of the battle.
  • Destroying the web bridges the Matriarch is standing on will result in fall damage.
  • If you don't care about the robe/loot she drops you can use a gravity pushing spell, thunder arrow, etc. To push her off in to the green cavern below… Instant kill. Also, shoving her down the central cavern hole now causes her lootable corpse to be found in the Underdark at the spot where you land if you feather fall down the hole.


All Bosses in Baldur's Gate 3
Auntie Ethel  ♦  Bulette  ♦  Dror Ragzlin  ♦  Filro the Forgotten  ♦  Kagha  ♦  Minthara  ♦  Spectator  ♦  True Soul Gut  ♦  Warrior Puce


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    • Anonymous

      Killing her with fall damage or throwint down the underdark denies all XP tough, and she rewards 150 XP pretty early in the game.

      • Anonymous

        As of patch#8, she falls from destroyed webs again. Also, shoving her down the central cavern hole now causes her lootable corpse to be found in the Underdark at the spot where you land if you featherfall down the hole.

        • Anonymous

          As of Patch #7 - Version Number: - destroying the spider webs no longer causes the matriarch to fall. She will remain suspended in mid air and continue her attacks.

          • Anonymous

            Just had this happen in my game. Used a void bulb near the matriarch and it pulled her into the pit in the center. Sure we lost out on the loot, but it was just too funny.

            • Anonymous

              Sleep is your friend in dealing with the little spider swarms that she summons. Gale put to sleep 2 full groups of those, which is huge b/c they distract you from focusing on the big mama.

              • Anonymous

                the cobweb walkways don't seem to be destroyed by burning hands, so if you wanna use the "destroy walkways to inflict fall damage" you should avoid using that spell. instead use fire bolt or a burning torch as a mace and attack the walkway. the matriarch also seems to be able to notice you walking on any of the cobweb walkways before initiating combat.

                • Anonymous

                  If you are having problems beating her you can stealth or sneak up to most of the eggs and destroy them before the fight starts. The spider webs have 4 hp and if you knock down the webs when the matriarch is on it she will take a ton of fall damage.

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