There’s something about Der Eisendrache that makes it a timeless classic in Call of Duty Zombies. Maybe it’s the gothic castle setting, the epic score, or the apocalyptic sky split open by a giant dragon. Or maybe—it’s the perfect blend of old-school Zombies and story-driven secrets that makes this Easter egg one of the best ever made.

If you're here to conquer it, whether solo or with two players, this is the ultimate 2025 guide to completing the Der Eisendrache Easter egg. Every step, every bow, every ritual—streamlined and battle-tested.

This Easter egg can be completed solo, with 2, 3, or 4 players—but it does require:

• All four bows built and upgraded

• A Pack-a-Punched weapon (preferably with a special ammo type)

• A solid understanding of the map layout

• Good timing and communication (even solo, for NPC triggers)

So grab Juggernog, stock up on ammo, and let’s get serious.

You'll need all four upgraded bows completed to proceed with the main Easter egg steps. Even in solo mode.

Start by turning on the power. It’s in the main courtyard near the gate trap.

Then, head underground to the pyramid room (underneath the clock tower) and stand on the four pressure plates to enable low-gravity mode. You’ll need this later for bow upgrades and final steps.

After feeding the three dragon statues (courtyard, church, underclock), you can claim the Wrath of the Ancients from the knight’s tomb.

Then, begin your bow upgrades. You can do them in any order, but here’s what we recommend:

1. Storm Bow – Fast, powerful, and great for crowd control.

2. Wolf Bow – Excellent for solo players.

3. Void Bow – Strong but setup-heavy.

4. Fire Bow – Challenging to upgrade, save it for last if possible.

Pro tip: Assign players to different bows to speed up the process.

Use the teleporter near the pyramid room to reach the rocket test site. You’ll need to:

• Wait for the rocket launch sequence

• Survive the lockdown event

• Grab the Ragnarok DG-4 part (spawns near the launch switch)

Don’t leave without that part—it’s one of three required for the gravity spikes.

Collect all three parts:

1. Rocket Test Site – During launch sequence

2. Death Ray Trap – After activation

3. Panzer Soldat Drop – After killing your first Panzer

Craft it at any buildable bench. You’ll need it for the boss fight later.

After all four bows are upgraded:

• Place each upgraded bow on the correct statues in the undercroft.

• Shoot the clock tower panel to begin the Wisp Step .

Wisps spawn randomly across 8 known locations. Use a bow to shoot the correct wisp in the right order. You have to hit all six without missing. Miss one, and it resets.

Locations include:

• Phone near Samantha’s room

• Car tire in the hallway

• Clock above the power room

• And others around the map (church, armory, labs)

When all are shot correctly, the teleporter turns purple.

Take the teleporter again—this time, it sends you to a flashback scene.

Grab the blue vial and listen to Dr. Groph. When you're sent back to the present, head to the Death Ray machine and insert the blue item.

Next: charge the terminals across the map (three locations) by interacting with panels. This prepares the system for the next big step.

Place the Ragnarok DG-4 on the panel beneath the clock tower. This begins a soul collection phase .

Kill zombies in the area until the souls are fully absorbed. You’ll hear an audio cue when complete.

Then, a new panel opens in the Death Ray area—this lets you start the boss fight.

Prepare yourself:

• Full upgraded bows

• Shield and Ragnarok equipped

• Max ammo (use dog round beforehand if possible)

Activate the panel and teleport to the Moon Pyramid chamber.

Boss Fight Phases:

1. Keeper Fight – Avoid his shockwaves and charge pads using the Ragnarok.

2. Void Waves – Circles of damaging energy fill the arena. Keep moving.

3. Minion Spawn – Panzer Soldats, hellhounds, and standard zombies join the chaos.

Use upgraded bows (Storm and Wolf are best) to keep mobs under control. Keep a cooldown rotation on the Ragnarok DG-4.

After enough damage, the Keeper will freeze. Place the Ragnarok in the glowing plate to end him.

Once the Keeper dies, you’re pulled into a cutscene revealing Richtofen’s plans. The Moon base is destroyed, and the Easter egg concludes.

The achievement “My Brother’s Keeper” will pop, along with massive XP rewards.

Der Eisendrache’s Easter egg is a masterpiece. It threads lore, tension, and tight mechanics into a one-of-a-kind Zombies experience that still holds up years later. Whether you're solo or squad-deep, this guide gives you the edge to finish it cleanly.

So gear up. Aim straight. And remember: when the moon explodes, you’ll want to say you were there.