Under the Blue Sky
Under the Blue Sky is a 4★ Light Cone for the Path of Destruction in Honkai: Star Rail.
A 4-star cone giving flat ATK plus a CRIT Rate boost on landing a killing blow, decent for clearing trash mobs but unreliable against single bosses with no kills, keeping it as filler.
Increases the wearer's ATK by 16%. When the wearer defeats an enemy, the wearer's CRIT Rate increases by 12% for 3 turn(s).
Under the blue sky, fields of wheat were dancing. The young girl was carefully weaving a flower wreath, for her most beloved little sister. That was when they were still the same height. That was when they shared the same smile.
How to read this Light Cone page
Every Light Cone has exactly one passive effect tied to the wielder's combat performance; that effect scales up as you Superimpose it from S1 to S5 — use the S1-S5 buttons above to see the exact numbers at each level instead of guessing or interpolating. A Light Cone only delivers its full value on a character who shares its Path; "Characters who use this cone" lists every character on that Path, while "Best users" is a narrower list pulled from real build consensus, not a guess.
Base stats (HP/ATK/DEF) are shown at Lv80 for every cone of the same rarity so they can be compared directly; a 5-star cone will always edge out 4-star and 3-star ones here — the real difference lives in the passive effect, not the flat stats. The "Alternative cones on the same Path" section suggests a few other options if you do not own the signature cone yet, or want to compare before spending ascension materials.
See the full list on the Light Cones page, or check terms in the HSR Glossary.