The special weapon on the Die Maschine map, the first in Black Ops Cold War's Zombies mode, is titled D.I.E. Maschine.
Like the Ray Gun, it can be obtained randomly through the mystery box. However, there is a way to get it without having to waste your money.
D.I.E. Shockwave free
Here's a step-by-step look at the second method to get the Shockwave D.I.E.:
Turn on the electricity and assemble the Pack-A-Punch
To turn on the electricity you will have to make your way to the "Installations" that will be marked on the minimap and on the HUD when starting a game.
There are purple arrows on the walls of the map that indicate the way to get to the light switch.
Once you turn on the light, you'll need to open the dark ether portal in the particle accelerator room and enter it to pick up the Pack-A-Punch piece.
With the piece in hand, you just have to assemble the Pack-A-Punch and then wait until the game returns you to the normal world.
Get the golden card
The next thing you need to do is kill a special zombie (like the one in the picture) to get a golden access card.
These zombies can appear at any time after the first round of dogs, so you should be on the slope.
Remember that this zombie has two phases and once you defeat it for the first time, it will be divided into two zombies that you must also defeat.
The last one to delete will leave you the card as you can see above.
Get the D.I.E remote
With the card in hand, you should now go to this section of the map called "Weapons Lab", which appears in the image below.
This one is located near the particle accelerator and has what appears to be a nuclear bomb hanging in the middle.
You'll need to approach the room in a corner seen in the capture and there you can interact with a terminal where you'll need to insert the card.
Once inserted, a drawer will open right next to it and there you can get the D.I.E. remote control for the next step.
Access Nacht's secret room
For the last step we have to use the remote control to activate a Shockwave D.I.E. that is inside a room in the Nacht der Untoten section.
In order to activate it, you have to approach that hole in the wall found in the screenshot above.
As long as you're in control, a voice will tell you that a signal has been detected when you approach this section of the map.
This is to tell us that there is a Shockwave D.I.E. in that room and the D.I.E. remote can activate it.
Once activated, the weapon will start sucking as close as possible. You must carry a lot of zombies near that room so that it can be absorbed by the special weapon.
After absorbing a certain number of zombies, a voice will tell you that the machine is already loaded.
The only thing left to do is to approach the machine again and interact with it to release a lot of energy, making the reinforced door open.
In the room you will see a skeleton holding a normal version of the D.I.E. Shockwave, which you can collect and use.
By doing this you will receive the Carpe D.I.E.M of the game.
If you prefer a video, here's the Noahj456 tutorial you recently posted: