USB Calibration Data and Refractor Locations guide in Zombies CoD Modern Warfare 3 2023 (MW3). See location USB map, how to solve it, location of Refractors, spawn Greylorm, & more
Table of Contents
Process To Greylorm Combat
Gather 4 USB Calibration Data To Activate Refractors
Use the guide below to locate 4 USBs and activate the Refractors to summon the Easter Egg Boss, Greylorm and defeat it. The Greylorm is a powerful boss and when you defeat it, you will get a Rare Schematic (The Scorcher, Flawless Aetherium Crystal, Legendary Aether Tool) at Random selection.
- Heading to one of C1, E8, G7, or H2 section to find out where the USBs are located.
- Get inside the building
There are four photos on the wall in the building. Find each photo that depicts a random location where the Consoles are located. - Collect the 4 USBs
At each photo location, find and activate the consoles. Make sure to collect the calibration data that falls onto the ground at each activated console. - Wait for Aether Storm
Look for the location of Refractors by finding a spot with two ammo containers near the Aether Storm and wait for the area to be covered by the storm. - Activate Refractors
Activate the four refractors in the area once the designated location is covered by the Aether Storm - Wait for Greylorm to spawn
After activating the refractors, wait for a bit until Greylorm appears from the ground
Head To Buildings On Map
1. Heading to One of C1, E8, G7, or H2
| C1 Location | H2 Location |
|---|---|
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| E8 Location | G7 Location |
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First, First, go to section C1 or E8 or G7 or H2 and find the buildings marked on the map above.
The Console Maps Can Be Found In The Building
Maps are located on the second floor of the building for C1 and H2, and on the first floor of the building for E8 and G7.
Figure Out The 4 Locations Pictured In The Zoomed Portraits
Inside the building, you will find a map on the wall, like the picture featured above. There will be 4 portraits, and each location will have a Calibration Data USB so remember those locations and head there.
There are a total of 12 patterns so far confirmed, and 4 locations are chosen randomly.
Calibration Data USB Locations
Can Not Exfil Calibration Data USBs
The USBs will disappear during Exfil, and you can not take it to your next match. But if you have drank the Tombstone and died, then you will be able to pick it up in your next match, so if you want to take your time to get ready, then using the Tombstone might be a good idea.
Calibration Data USB Locations
| USB Map Photo | Full Map | Enlarged |
|---|---|---|
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Refractor Locations
4 Patterns In Total
| 1 | 2 |
|---|---|
 |  |
| 3 | 4 |
 |  |
2 Ammo Cache Are Lined Up Is The Key
Within the 4 locations, the closest point to the Aether Storm will be where the Refractors appear. There will be 2 Ammo Caches appear which will be the key, so zoom in your map and find where the Refractor will spawn.
Activate When Refractors Gets Enclosed In Aether Storm
When the Aether Storm starts expanding, the Refractors will be enclosed in the Aether Storm which allows you to activate them. Use the 4 USB Calibration Data that you collected and activate the Refractors which will make the Zombies spawn. When you wait a while, the Greylorm will appear. If you are struggling on how to defeat the Greylorm, use the link article below.
How To Beat GreylormRelated Articles
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| ACT 1 Tier 2 | |
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| ACT 2 Tier 2 | |
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| ACT 3 Tier 1 | |
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| ACT 3 Tier 2 | |
| Ghosted Mission | Crash and Burn Mission |
| Alternate Current | Most Firepower Mission |
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| ACT 4 Story Mission | |
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