Now that you’ve unlocked the Ritual Chamber and solved the first puzzle, it’s time to continue your journey toward completing the Easter egg in Black Ops 6: Citadelle des Morts. In this part of the guide, we’ll cover some of the more difficult challenges and critical objectives that will push you toward the final stages of the Easter egg.

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1. The Lost Souls Challenge

After unlocking the Ritual Chamber, you’ll come across a series of locations that are cursed by the Lost Souls. These souls are manifestations of the zombies and must be trapped in specific locations around the map.

Here’s how you handle them:

  • Locate the Soul Traps: There are several Soul Traps scattered around the map. These traps are marked by glowing symbols on the ground. Once activated, a wave of Lost Souls will spawn.
  • Capture the Souls: The goal is to capture the Lost Souls by guiding them into these traps. The Lost Souls move toward the traps automatically, but you must defend them from the zombies and ensure they stay in place.
  • Trap All Souls: There are several locations where you’ll need to trap Lost Souls, each requiring a different approach. Some may need multiple players to coordinate, while others may be easier to trap with a single player.

Once all Lost Souls are captured, you’ll unlock the next phase of the Easter egg.

2. The Elemental Keys Puzzle

After dealing with the Lost Souls, you’ll encounter a complex puzzle involving the four elemental keys: Fire, Water, Earth, and Air. These keys must be obtained from different parts of the map, and each element will require you to complete a unique challenge.

  • Fire Key: To obtain the Fire Key, you’ll need to ignite a set of torches located across the map. Once all the torches are lit, the key will be revealed.
  • Water Key: The Water Key involves filling specific vessels with water from fountains found in the central areas. Once the vessels are filled, the key will appear.
  • Earth Key: The Earth Key is hidden in the dirt. You’ll need to dig in specific areas of the map to find it. Be careful, as zombies can attack while you’re digging.
  • Air Key: The Air Key is unlocked by solving a series of wind puzzles, where you must direct gusts of wind to specific locations by activating fans and vents.

Once all four keys are obtained, return them to the Ritual Chamber to unlock the final challenge.

3. Preparing for the Final Boss Fight

After collecting the keys, you’ll unlock the final area and prepare for the ultimate showdown: the boss fight. This is where all your preparation, teamwork, and puzzle-solving will pay off. The boss will be a formidable creature—fast, strong, and capable of summoning additional zombies during the fight.

Make sure to:

  • Upgrade Your Gear: Before entering the final arena, upgrade your weapons, and make sure your team is equipped with powerful gear, perks, and healing items.
  • Communicate with Your Team: This boss fight will require impeccable coordination. Make sure everyone is clear on their role—whether it’s focusing on the boss or holding off waves of zombies.

With the boss defeated, you’ll unlock the final piece of the Easter egg and receive your reward.