Mastering the standard elemental weapons in Call of Duty Zombies is essential for survival, and the Krossa dal Shamir, better known as the Fire Bow, stands out as a devastating asset on Der Eisendrache. Upgrading to this fiery weapon requires players to complete a series of specific, accuracy-testing steps scattered across the snowy castle grounds. Securing this magma-infused upgrade heavily boosts your team defense during high-round runs and boss fights.
Obtaining the Broken Arrow and Launching the Quest
Before beginning your trial of fire, you must first secure the base Wrath of the Ancients weapon by feeding the three dragon heads around the castle. Once you possess the standard bow, head directly to the clock tower area and look for an intricate wall carving nearby. Shooting this symbol with your bow causes a glowing wall fragment to break loose, revealing the broken arrow artifact waiting for your retrieval.
Picking up the broken arrow initiates the upgrade questline and triggers an immediate test of your map traversal knowledge. Players must wait for the corruption launch pad sequence to become available near the death ray trap area. Launching yourself across the sky while aiming down sights is crucial for the next phase of the challenge.
Igniting the Volcanic Rock Circles
While airborne from the launch mechanism, you must fire a precise shot at a specific glowing rock located near the rocket test site. Successfully hitting this target causes a massive molten rock to crash down into the courtyard, creating a central hub for the next trial. This volcanic protrusion serves as the anchor point for a series of glowing circles that appear on the ground across different biomes.
You must stand directly within these glowing boundaries and defeat incoming zombies to feed souls into the volcanic energy pools. Each circle requires a set amount of essence to fully charge, glowing brighter as it nears completion. Navigating between these areas during a round requires a solid strategy to manage tight corridors and aggressive hordes.
Completing the Fire Circle Challenge
Once all the circles are adequately charged, head back to the clock tower to interact with the mechanism and reveal a hidden ancient symbol. This glyph dictates which specific fireplace around the castle needs to receive a condensed projectile of magma energy. Players must stand in the corresponding charged circle and chain precise trick shots through the environment to guide the flame home.
Landing the final shot inside the hearth ignites the fireplace with a permanent red flame, signaling that your arrow has been successfully reforged. If you miss or run out of shots, the sequence resets, forcing you to try the pathing again on the next round. Interacting with the burning hearth rewards you with a fully restored magma arrow piece.
Reforging the Upgraded Fire Weapon
Take your newly completed artifact down to the undercroft room and place it inside the dedicated fire sacrificial box. You will need to harvest a final round of zombie souls within the immediate vicinity to maximize the weapon energy matrix. Once the collection process finishes, present your base bow to the box to trigger the ultimate transformation ritual.
The ritual reforges your gear into the Krossa dal Shamir, giving you access to charged magma shots that trap and incinerate large groups of enemies instantly. This weapon is incredibly effective at dealing massive burst damage to the formidable Panzersoldats that arrive during higher survival waves.
