This guide will show you how to build the zombie shield on Blood of the Dead. You have to gather 3 parts in order to build the Spectral Shield. Two have to be actually collected and one is dropped by the warden after he has been taken out. Here are the parts:
The essence looks like blue smoke and it’s being emanated by the a red electrical box inside the prison.
Location #1: Outside the cafeteria, next to the staircase leading down to the showers (Time’s Square). The Auger DMR wall-buy is right next to this box as well.
Location #2: Right outside of the warden’s office (Michigan Avenue).
Location #3: In the Library next to the entrance.
The Warden’s Key
In order to get the Warden’s Key you have to defeat the warden when he spawns in. He does that right after you have turned on the power for the prison (second switch) or he spawns naturally for the first time somewhere between round 6-8.
Shield Location #1: In the Citadel Tunnels, behind one of the corrugated iron walls while walking down the tunnels.
Shield Location #2: At the exit of the Citadel Tunnels (bottom of the tunnels). When you exit the tunnels, turn left for this possible spawn point.
Shield Location #3: Just outside of the second power room near the exit of the Citadel Tunnels leaning against the wall.
Head over to a workbench to assemble the Spectral Shield.
Location #1: By the docks, on the right side after coming down the stairs.
Location #2: On the third floor of the cell blocks, on the left when you are walking towards the Gondola.
That’s all the possible shield part spawn points on Call of Duty Black Ops 4’s Blood of the Dead Map. After finding the 3 parts, assemble the shield at the workbench as shown above.