Crafting and Gear Upgrades
Operation Crimson Hammer Materials
Play the free expansion mission for its unique Seerus Arsenal rewards.
Operation Crimson Hammer in Expansion Missions, within the Grand Arsenal.
Repeat the mission as needed for required fragments. The expansion mission is repeatable, while the exact rewards per clear should be treated according to the current mission display.
Stop when you have the fragments required for the chosen Seerus Arsenal craft or no longer need its rewards. Switch to the crafting interface once the recipe requirements are satisfied.
Open a guide to find other locations and see what the item is used for.
Play the free expansion mission for its unique Seerus Arsenal rewards.