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Operation Excision Outbreak Easter Egg Part Two Complete Solo Guide - Cold War Zombies

Step 3: Red Aethereal Orb

You will now need to assemble the recon rover located at the main bridge, and for that, you need to find a red aethereal orb.

The red aethereal orb is similar to the one you encounter during the random world side easter egg. You can find more information about the side easter egg here.


However, as the name suggests, the red aethereal orb is red in color and behaves slightly different from the regular aethereal orbs when shot at. It only flies in the direction you shoot it at.

You need to shoot the orb in the direction of the main bridge where the recon rover is. You can mark the bridge on the map overview to get a general sense of direction.

There are three orb locations in Sanatorium, and it can spawn in any one of them. The locations are as follows:

Red Aethereal Orb - Sanatorium Pool

In the middle of the Sanatorium Pool.

Red Aethereal Orb - Bathhouse Roof

On the roof of Bathhouse.

Red Aethereal Orb - Maintenance

On the roof of the Maintenance building.

Once you've found the orb, as mentioned before, shoot it in the direction of the main bridge. It will fly to a couple of places along the way to the bridge. You need to shoot it in the direction of the bridge every time it stops.

Once the orb reaches the bridge, it will stop on top of the modified recon rover. Ensure you do not shoot the orb once it is at its destination, as it can still move.

The orb will not go inside the modified recon rover. For that, you need a toy to lure it inside the cage of the rover. This takes us to our next step - The Aether Bunny step.

Step 4: Aether Bunny

The next step is to find a broken mystery box. As we already know, all the mystery box locations have a blue bunny as well. We need to find a broken mystery box, and it will also have a toy aether bunny on it.

The broken mystery box can be at any one of the mystery box locations on Sanatorium. Luckily, there are only three locations. Out of the three, we can always skip the active mystery box (the one that has a blue lightning beam coming out of it) as we're looking for a broken one.

The following are the three mystery box locations on Sanatorium.

Mystery Box Location 1 - Groundskeeping

Mystery Box Location 2 - Sanatorium Roof

Mystery Box Location 3 - Market Square

Once you've found the bunny, interact with it.

Upon interaction, the bunny will start to hover in mid-air, spawning a horde of zombies to attack you.

Eliminate all the spawned zombies.

Once you've killed all the zombies, the bunny will come back down and also drop a lot of valuable loot for you.

You can now pick up the bunny (now constantly glowing blue) and make your way to the modified recon rover at the main bridge. Once you pick it up, you will the same vision as the one seen when holding the canisters during the 'Retrieve' objective, and you also use the special ability.

You can also ride vehicles while holding the bunny.

Take it to the modified recon rover at the bridge and insert it into the rover cage to lure the orb into the recon rover.

The orb will fly into the rover, and it will drop another Omega Audio Recording. Interact with the radio to listen to a recording.

Once the recording finishes, you will get an option to activate the aetherium neutralizer.

Activatin the aetherium neutralizer will spawn in an energy field around you. This energy field or 'bubble' will move with the recon rover. You must stay inside the bubble as the rover moves forward.

Zombies are going to spawn and attack you as you move forward. The ammo is limited so make sure you stock up on ammo before activating the neutralizer.

Once you reach the Monument, the rover will crash into a wall and will be destroyed. The bubble will also disappear, but you won't get hurt outside the bubble anymore.

Make your way to the Monument. You can also get ammo on your way to the Monument.

Upon reaching the Monument, turn left towards the stairs leading up to the roof. Either take the stairs or use the rappel.

Go through the double doors and turn left to find the dead bodies of the scientists along with another Omega Audio Recording.

Play the audio recording, and once it finishes, it will play a loud alarm sound similar to the one that plays during the unknown radio signal easter eggs. It will attract all the zombies towards you, which takes us to our next and final step.

This article is original content created and researched by For an overview of our process and Call of Duty credentials, please see here.


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  1. Shootout to the best written and illustrated guide to this Easter egg. Been wasting some time with other guides which were not specific enough or plainly wrong.
    Thanks a lot man!

  2. The red orb can also appear in the group of houses in the bottom right corner of the map near one of the original spawn points, just spent 40 minutes checking the 3 locations mentioned to find it there, they may have updated to locations after de Toten was added.

    1. Hi Chase!

      Thanks for that. That is good info to have. We will go through it and add the new locations!

  3. Me and a friend of mine done this Easter egg last night we killed orta and got on the chopper to exfil but got shot down after it played a cut scene and said to be continued what did we do wrong or what is the next step

    1. Hi Rodney!

      That is how it's supposed to be. This easter egg is pretty much the prologue for the next round-based map - Mauer Der Toten. The story continues on that map. So you've done everything correctly!

  4. Ive attempted this once before with a different gun and failed. Using your Amp recommendation i took the Orda down with close to 3 minutes left and using ONLY the Amp. THANK YOU FOR THIS!!!! Going to be using the other guides to unlock the Super EE with this newest season!

  5. Thank you Hassan, for the walktrough! Did it with a single m1911 pap 3 with shatter blaster and pap 3 m79 (did not have the dual wield ability). Tried it before with a friend, but we faled.. Do you have any tips for completing duka missle silo?

    Greeting Robin

    1. Hi Robin. Thanks a lot for your comment and positive feedback. I appreciate that. I'm assuming you're asking about the first part of the easter egg when you're in the bunker? Treyarch has reduced the difficulty of that part of the easter egg reducing the number of zombie spawns and decreasing their sprint speed. If you're looking for a guide, please check out our complete guide here. Check out Step 3 where we've covered everything in detail with tips. I hope it helps!

Hassan Sajid

Hassan has always loved Battle Royale games, right from the start of his gaming career. Aside from utilizing his engineering background in several areas of his life (with a degree from the National University Science & Technology), he loves to use his technical knowledge and skills to contribute towards the gaming community. He has played PUBG and Fortnite extensively and as a fan of the Call of Duty series, Warzone is a no brainer for him. His favourite Call of Duty title is Modern Warfare 2. Hassan uses his in-game experience to create guides and videos that are aimed at helping other Warzone players become better. Hassan is also on LinkedIn and of course Steam.