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Elden Ring

Swamp of Aeonia Walkthrough and Location

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★Check Out Our Elden Ring Nightreign Wiki!★
★ Scadutree Fragments | Revered Spirit Ashes
☆ Scadutree Blessing Scaling Explained
★ Best DLC Weapons | Best DLC Builds
☆ Best Weapons Tier List

Swamp of Aeonia is a Minor Dungeon in Elden Ring that can be found in Caelid. Read on to learn more about Swamp of Aeonia, including its location on the map, walkthrough, and obtainable items!

List of Contents

Swamp of Aeonia Location

How to Get to Swamp of Aeonia

Swamp of Aeonia
Elden Ring - Swamp of Aeonia Location
View Full Map
Type Minor Dungeon
Region Caelid
Location Caelid, center region

Swamp of Aeonia makes up the center region of Caelid. It is surrounded by the Caelid Highway.

Swamp of Aeonia Walkthrough

Swamp of Aeonia Checklist
CheckmarkDefeat Commander O'Neil

Defeat Commander O'Neil

Commander O

Commander O'Neil is a slow moving boss that makes use of summons. Keep a distance from him and prioritize taking out his summons, before engaging him in one-on-one combat.

Defeating Commander O'Neil will get you the Unalloyed Gold Needle. This is required for Gowry's and Millicent's questlines.

How to Beat Commander O'Neil: Boss Fight Guide

Elden Ring Related Guides

Elden Ring - Dungeons

All Dungeon Locations

DLC Dungeon Walkthroughs

Gravesite Plain Dungeons

Dragon's Pit Lamenter's Gaol Ruined Forge Lava Intake
Castle Ensis Ruined Forge of Starfall Past Fog Rift Catacombs
Belurat Gaol Rivermouth Cave Fog Rift Fort
Church of Consolation Scorched Ruins Western Nameless Mausoleum
Southern Nameless Mausoleum - -

Scadu Altus Dungeons

Fort of Reprimand Darklight Catacombs Eastern Nameless Mausoleum
Moorth Ruins Midra's Manse Stone Coffin Fissure
Church of the Crusade Bonny Village Bonny Gaol
Village of Flies Cathedral of Manus Metyr -

Land of the Tower Dungeons

Enir-Ilim Scorpion River Catacombs Taylew's Ruined Forge
Belurat, Tower Settlement Northern Nameless Mausoleum -

Shadow Keep Dungeons

Shadow Keep (Main) Specimen Storehouse Church District
Shadow Keep Back Gate Scadutree Chalice -

Dungeon Walkthroughs

Limgrave Minor Dungeons

Summonwater Village Stranded Graveyard Stormfoot Catacombs
Coastal Cave Groveside Cave Dragon-Burnt Ruins
Limgrave Tunnels Murkwater Cave Murkwater Catacombs
Deathtouched Catacombs Highroad Cave Waypoint Ruins
Castle Morne Impaler's Catacomb Earthbore Cave
Demi-Human Forest Ruins Tombsward Catacombs Morne Tunnel
Tombsward Cave

Liurnia of the Lakes Minor Dungeons

Stillwater Cave Lakeside Crystal Cave Cliffbottom Catacombs
Raya Lucaria Crystal Tunnel Black Knife Catacombs Ruin-Strewn Precipice
Academy Crystal Cave Kingsrealm Ruins Caria Manor
Cathedral of Manus Celes Road's End Catacombs

Caelid Minor Dungeons

Sellia, Town of Sorcery Minor Erdtree (Caelid) Gael Tunnel
Caelem Ruins Gaol Cave Abandoned Cave
Sellia Crystal Tunnel Divine Tower of Caelid Minor Erdtree (Greyoll's Dragonbarrow)
Swamp of Aeonia Caelid Catacombs War-Dead Catacombs
Sellia Hideaway Minor Erdtree Catacombs Dragonbarrow Cave

Altus Plateau Minor Dungeons

Perfumer's Grotto Sainted Hero's Grave Altus Tunnel
Dominula, Windmill Village Sealed Tunnel Auriza Hero's Grave
Auriza Side Tomb The Shaded Castle Sage's Cave
Lux Ruins Wyndham Ruins Wyndham Catacombs
Unsightly Catacombs Hermit Village Gelmir Hero's Grave
Seethewater Cave Volcano Cave Old Altus Tunnel
Subterranean Shunning-Grounds Leyndell Catacombs

Ainsel River Minor Dungeons

Nokstella, Eternal City Grand Cloister Lake of Rot

Siofra River Minor Dungeons

Nokron, Eternal City Hallowhorn Grounds (South) Hallowhorn Grounds (North)
Siofra Aqueduct

Mountaintops of the Giants Minor Dungeons

Castle Sol Giant-Conquering Hero's Grave Giants' Mountaintop Catacombs
Minor Erdtree (West Mountaintops of the Giants) Spiritcaller's Cave Consecrated Snowfield Catacombs
Yelough Anix Tunnel Cave of the Forlorn Minor Erdtree (Consecrated Snowfield)
Yelough Anix Ruins Zamor Ruins

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