Completing the main Easter egg in Ashes of the Damned is a real challenge. Black Ops 7 Zombiesand getting all the serum items can be quite difficult.
Serum items are a collection of different body parts that you first need to find. You will then have to use these items to decipher the code in Yuri's laboratory that will be shown on the board.
How to Collect All Serum Items in Black Ops 7 Zombies Ashes of the Damned
There are seven different items associated with the Yuri's Laboratory code quest. Here's a rundown of how to find them all. All seven points are relatively simple if you know what to do.
- Accumulation pieces: For this part you will need the Abomination Head Hood upgrade for Ol'Tessie. Afterwards, use the beam to shoot down any purple ether flora as you travel between any two locations. You will be able to get pieces of the treasure from them along with trophies.
- Mysterious limb: Once Zursa appears on the map, use Ol'Tessie's beam attack to kill her. This will leave you with a Mysterious Limb.
- Mushrooms: Enter the main cabin at Blackwater Lake and you will find a spore jar. You won't be able to see the jar (possibly because of the bug), but it is in the sink on the south wall of the kitchen. If you don't see the jar, just interact with the top right corner of the shell and keep checking your inventory. Place the jar on the dead horse on the road in front of Vandoorne Farm and wait three rounds for the mushroom to grow.
- Eyes of the Ravager: You'll have to put the Ravager through a saw trap to get his eyes. You can find the Saw Trap at Exit 115. Just activate it when there are Ravagers around you and the first one will lower its eyes if killed.
- Sole: There are a couple of corpses hanging at the main entrance to Vandoorne Farm. Use the Tomahawk on any of them to get a Corpse Leg.
- Powder: Travel to Ashwood, where the mirror is located. Use the Wisp to activate the mirror and then break it Necrofluidic Gauntlet to obtain powder.
- Syringe: The syringe is on a shelf inside the radio room at the Zarya cosmodrome.
How to Use Serum Items in Black Ops 7 Zombies Ashes of the Damned
After collecting all the items, go to Yuri’s laboratory at the Arya Cosmodrome location. You will find a smoking flare and a cipher on the wall. Wait until the smoke turns gray before adding the ingredients in the correct order. Here is a list of symbols and their corresponding ingredients.
- CL – Eyes of the Ravager
- L and reverse L – Mysterious limb
- C< – Mushrooms
- LC – Collect chamkas
- >J – Leg
Use the first two letters of the code to figure out what ingredients you need to enter. If done correctly, the flask will ask you for blood, which will trigger the blocking sequence. Select the ingredients according to the code shown on the board (sticking to the first two letters).
