Key of Reason/4-star

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Key of Reason (4) (Icon).png ATK CRT Rarity
187 12 Star (Icon).pngStar (Icon).pngStar (Icon).pngStar (Icon).pngGray Star (Icon).png
Bronya constructed this cannon using the Core of Reason. It can be mounted on Project Bunny or deployed as hover guns. The Power to Rebuild of the Herrscher of Reason required years to fathom, but Bronya understood this cannon in mere seconds thanks to her prior knowledge of war and weaponry.
Universal Blueprint
Charged cannon.
  • 1st Sequence: Single shot.
  • 2nd Sequence: Empowered double shot.
  • 3rd Sequence: Super-powered triple shot.

Wielder deals 22% more Ice DMG.

Logical Construct
[SP: 5][CD: 25s] Unleash a constructor weapon ATK that deals 340.0%+9*53.0+300% ATK of Ice DMG. Final hit freezes enemies for 3.6s. After use, wielder ATKs gain 35% Total DMG Multiplier for 7s.
Herrscher of Reason equip bonus: Active skill inflicts 7s Analyzed debuff on enemies. Casting the Ultimate gives 5 SP.
Obtained From
Featured in:
Key of Reason and Welt Yang Focused Supply (9-4-20)
Key of Reason and Welt Yang Focused Supply (6-5-20)
Key of Reason and Welt Yang Focused Supply
Appears in:
Focused Supply

Upgrade Materials Required To Next Rarity

Required To Fully Upgrade
Frame (Purple).png
Honkai Cube (Icon).png
Frame (Purple).png
Twin Sakura Will (Icon).png
Frame (Purple).png
Phase Shifter (Icon).png