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To upgrade all four swords in Black Ops 6 Zombies’ Citadelle des Morts, claim the matching Bastard Sword from its knight statue, then complete its individual quest: Dragon for Caliburn, Stag for Durendal, Raven for Balmung, or Lion for Solais. Caliburn requires three fire runs, Durendal three charged Lightning Rods, Balmung a match-specific dial puzzle and three portal feeds, and Solais Parasite charges followed by a four-symbol sequence.
Before you start: get a Bastard Sword
The Bastard Sword is a dedicated melee weapon, so it does not replace your primary or secondary weapon. Activision’s Citadelle des Morts map guide describes revealing Pack-a-Punch, collecting a sword piece dropped by an enemy, and taking it to a statue in the Entrance Hall. Detailed quest guides describe bringing a Stamp to the matching knight statue in the Dining Hall. Follow the route available in your match; the sources do not establish a fixed round number for starting these quests.
Each statue’s animal emblem identifies the sword:
- Dragon: Caliburn, fire
- Stag: Durendal, lightning
- Raven: Balmung, void
- Lion: Solais, light
After claiming a sword, complete its quest to turn it into the corresponding elemental Wonder Weapon.
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How to get Caliburn: Dragon’s Fire
Caliburn’s quest sends you between the dragon statue and three Aether-fire braziers. Carrying a fire charge drains your health, so make the return trip promptly. The official map guide places the braziers at the Ramparts, the Nature Path entrance, and Town Square.
- Take the Dragon knight’s Bastard Sword to the dragon statue and interact with it.
- Find and activate a brazier at one of the three locations: the Ramparts, Nature Path entrance, or Town Square.
- Carry the Aether fire back to the dragon statue and deposit it before your health runs out.
- Repeat the run for the other two braziers. Melee kills while carrying fire restore a little health, according to Activision’s map guide.
- After all three charges, claim Caliburn.
The guides use differing directional descriptions for the braziers, so use the named map areas as your landmarks rather than relying on a left/right callout that may depend on your approach.
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How to get Durendal: Stag of the Storms
Durendal requires three Lightning Rods and three successful charges at an urn on the cannon-side Ramparts. One rod comes from a fuse box and requires a weapon with Dead Wire; the other two are found near Deadshot Daiquiri and dropped by a zombie.
- Collect the rod near Deadshot Daiquiri.
- Equip or use a weapon with the Dead Wire ammunition mod and shoot the fuse box near Speed Cola to release another rod.
- Kill zombies until one drops the third rod.
- Place all three rods in the urn or vase on the Ramparts near the cannon.
- When the storm event begins, kill nearby zombies with the Stag sword until it glows with electricity.
- Strike the urn with the charged sword. Repeat the charge-and-strike sequence until all three rods have been charged, then claim Durendal.
Look around the cannon-side Ramparts for the urn; route descriptions vary by nearby landmark, and a single directional cue may not match your orientation.
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How to get Balmung: Raven’s Shadow
Balmung’s dial solution depends on the Antiquity item in your match. Find that item in the Alchemical Lab/library area, inspect what it depicts, and pair its zodiac sign with the corresponding elemental symbol on the tavern-cellar dial. Do not assume there is one fixed answer for every match.
- Find the Antiquity item in the Alchemical Lab/library area. Its type and location can vary; reported examples include a horn, jaw bone, fish fossil, scorpion fossil, and double raven skull.
- Take the Raven sword and the item to the dial in the tavern cellar.
- Rotate the dial to match the item’s zodiac sign with its elemental symbol.
- Complete the portal sequence by guiding the purple orbs into each portal as it appears. The portals appear at cellar/floor level and upstairs around the tavern.
- After all three portal stages, retrieve Balmung from the dial.
The item visible in your current match is the key to choosing the dial combination. A memorized combination from another match may not work.
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How to get Solais: Lion of Light
Solais uses glowing Parasites to charge the Lion sword, which you then use to open the lion-marked door near Speed Cola. The room beyond has a four-symbol shooting sequence.
- Take the Lion knight’s Bastard Sword and wait for glowing Parasites to appear.
- Melee a glowing Parasite to charge the sword.
- Strike the lion-marked door near Speed Cola with the charged blade.
- Repeat the Parasite charge and door strike until the door opens.
- Place the sword on the pedestal inside and note the symbol it displays.
- Shoot the corresponding moving symbol around the room. Continue following the symbols displayed by the pedestal, in order, until all four are completed.
- Retrieve Solais.
Which sword should you upgrade first?
There is no universally best order established by the walkthroughs. Choose based on the route challenge you would rather handle first:
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- Durendal: rod collection followed by storm timing and electric charges.
- Balmung: a match-dependent Antiquity and dial puzzle, then three portal stages.
- Solais: repeated Parasite-to-door trips followed by tracking four symbols in order.
What each upgraded sword does
Blizzard’s Season 01 Reloaded announcement describes the Bastard Sword as upgradeable into four elemental Wonder Weapons, each with a unique special attack and a passive effect that powers up over time. Its descriptions are:
Quick Recap
- Caliburn: Dragon’s Fire: “Create a fiery maelstrom of burning undead flesh, setting zombies alight and summoning an immense fireball.”
- Durendal: Stag of the Storms: “Summon thunderous power from the skies, discharging voltaic power to stun and stagger, before an electrical beam serves up a severe searing.”
- Balmung: Raven’s Shadow: “Cast your rotting foes into the Aetherial abyss, warping nearby enemies with a focused liminal tear.”
- Solais: Lion of Light: “The warmth of Light courses through you as you send foes screaming into darkness.”
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