Completing the main quest on Der Eisendrache stands as one of the most memorable achievements in Call of Duty: Black Ops 3 Zombies. Known as My Brother's Keeper, this storyline task takes players through ancient secrets, time travel, and an intense boss arena. Understanding the proper progression allows both solo players and co-op teams to complete the quest efficiently before rounds become too difficult.
Preparing the Castle and Upgrading Bows
The journey begins by restoring electricity across Griffin Castle and activating the pyramid in the undercroft. Players must feed the three dragon statues scattered around the map to acquire the Wrath of the Ancients bow. Once obtained, all players need to upgrade their elemental bows to prepare for the upcoming environmental challenges.
Time Travel and Safe Code Sequence
With upgraded bows ready, players shoot the teleporter prongs to initiate the electrical wisp hunt. Tracking down four glowing wisps turns the teleporter pad purple, allowing players to travel back in time. While in the past, collect the blue vial and fuses while paying close attention to the safe code symbols entered by Dr. Groph.
Activating the Death Ray and Keeper Escort
After returning to the present and defeating the Panzersoldat, input the memorized safe code into the castle computers. Retrieve the golden rods and floppy disk from the newly opened safe in the teleporter room. Players can learn How To Do Der Eisendrache Easter Egg Complete Black Ops 3 Steps by carefully coordinating the Simon Says memory game at the computers to bring down the Dempsey capsule.
Confronting the Keeper Boss and Final Step
Placing the golden rod near the knight's tomb summons a spectral Keeper that requires soul filling across four locations. Once the Keeper's journey is finished, place the missing blue cylinder on the pyramid and place your Ragnarok DG-4 spikes on the anti-gravity tiles. Inside the boss arena, trap the Keeper with gravity spikes when his chest glows yellow and clear out remaining Panzersoldats until victory is secured.
