St. 7308 Labs designed this tachi for arming Valkyries. This weapon changes its attack specifications according to the Honkai energy density of its wielder, vastly improving her combat capabilities.
ATK : 175 / CRT : 15 (at Max Lv 35)
When SP is below 20% of Max SP, gain 17% Physical DMG. When SP is 80% or higher than Max SP, each attack gains 72 Fire DMG.