The main quest in the Call of Duty: Black Ops III Zombies map Der Eisendrache remains one of the most celebrated experiences in cooperative gaming. Titled My Brother's Keeper, this complex Easter Egg challenges players to navigate an ancient Austrian castle while executing precise steps, upgrading mystical bows, and confronting powerful boss encounters. Successfully completing the quest yields significant narrative reveals and valuable in-game rewards that appeal to both casual players and dedicated story enthusiasts.
Preparing Your Arsenal with Upgraded Bows
Before initiating the main sequence of the quest, players must restore power and activate the anti-gravity mechanism in the lower pyramid room. Securing the Wrath of the Ancients bow by feeding the three dragon heads scattered across the map is essential for early survival. Players should aim to craft elemental bow upgrades like the Storm or Void Bow early to handle high-round zombie waves effectively.
Time Travel and Activating the Safe
Initiating the primary Easter Egg steps requires shooting the electrified prongs on the teleporter with a non-upgraded bow. Players must quickly locate and shoot glowing wisp objects across the castle using an upgraded bow to trigger time travel. Traveling back in time allows players to collect key fuses, obtain a soul canister, and memorize the digital code entered by Dr. Groph.
Summoning the Keeper and Boss Battle
After unlocking the safe using the retrieved code, players assemble the Ragnarok DG-4 weapon and call down the Vril capsule. Bringing the ghost Keeper through various soul-charging locations prepares your squad for the final arena fight beneath the undercroft. Defeating the corrupt Keeper requires placing Ragnarok traps to expose its vulnerable chest while avoiding heavy shockwaves and Panzersoldat spawns.
Unlocking Rewards and Quest Completion
Conquering the boss arena transports the team back to the castle where placing the Summoning Key triggers the ending cinematic. Players receive all perks permanently for the rest of the match alongside substantial XP bonuses such as the Frozen Freedom achievement. Navigating these steps fulfills a critical story arc while offering gamers an unbeatable sense of accomplishment.
