Target Weapon Research Banner: All 6★ weapons are available for an 80% chance on the 30th pull. Two other "off-banner" weapons share its pool, and it is possible to pull one of those instead of the targeted weapon. Available permanently.
Not all constructs can withstand the chill it constantly emits, and the fit between the gun and the blade reaches a wonderous peak through cold tempering. The energy released from the muzzle is transformed and utilized in the turbine to the extreme, driving the blade to emit a strong resonance.
When people reopened the door of the long-fallen weapons lab at the top of Kawakarpo, what they saw was the Gunblade lying among mechanoid wreckages, reflecting a dim blue light. Even after the corruption of long years and cold temperatures, it still worked like it had never been covered with dust. It was retrieved and brought back onto the battlefield by humans.