The Stellar Soul system serves as the source of Saber’s power, with each Stellar Soul carrying legendary tales of the kingdom and granting her unique combat enhancements. The first Stellar Soul, ＂Lost

In the vast and boundless Star River Continent, a legend is about to be born. She is the harbinger of destruction, the sovereign of the wind, and an existence that all insignificant lives look up to. Her name is Saber, the most thrilling figure in Honkai: Star Rail.
This Valkyrie from the Path of Destruction is like a warrior god descending upon the earth. Her lance, “A Thankless Coronation,” is the supreme symbol of a monarch, holding extraordinary power: 952.6 HP, 582.12 ATK, and 529.20 DEF. More astonishingly, its divine effects allow the equipping character’s critical hit damage to increase by 36% to 72%, and their ATK to rise by 40% to 80% when unleashing an ultimate skill. When energy reaches above 300, she can also direct energy recovery and continuously boost ATK.
At the start of battle, Saber gains 1 point of Furance Resonance, a mysterious energy that persists throughout the fight. When an ally unleashes their ultimate, her damage output increases by 40%, and she gains 3 points of Furance Resonance. For each point of Furance Resonance consumed, she recovers 10 energy points, a conversion efficiency that astonishes.
Her basic attack, “Wind King’s Domain,” deals 100% ATK wind damage to a single enemy. Her enhanced basic attack, “Liberated Golden Authority,” is even more formidable, dealing 150% ATK damage to all enemies. When the number of enemies is reduced to 2 or 1, her damage output increases by an additional 150% or 70%.
Saber’s skill, “Wind King’s Hammer,” is equally impressive, dealing 150% ATK damage to a single enemy and 75% ATK damage to adjacent targets. If she holds Furance Resonance, the skill’s damage multiplier increases by 14% per point and immediately restores full energy. If unable to fully restore energy, she gains 2 points of Furance Resonance.
Most impressive is her ultimate skill, “Sword of Victory Oath,” which deals 280% ATK wind damage to all enemies, followed by 10 consecutive random single-target attacks dealing 110% ATK damage. After casting the ultimate, her next basic attack is replaced by “Liberated Golden Authority,” making her combat rhythm more flexible and varied.
As a true monarch, Saber possesses a unique secret technique, “Entrance of the Knight King,” which increases her ATK by 35% for the next 2 rounds and grants 2 points of Furance Resonance upon use. This powerful opening advantage allows her to gain the upper hand at the start of battle.
In her Astral System, we see her deep connection to the kingdom. The first Astral, “Lost Chalk Fortress,” increases her ultimate damage by 50% and grants an additional point of Furance Resonance after basic attacks or skills. The second Astral, “Sealed Round Table Vow,” increases the critical hit damage of her enhanced skills by 50%, with an additional 5% critical hit damage per point of Furance Resonance, stackable up to 10 times. The third Astral, “Fifteen Centuries of Pursuit,” increases her ultimate level by 2 and basic attack level by 1. The fourth Astral, “Fourteen Winter Days’ Wait,” increases her skill level by 1 and DEF by 20%. The fifth Astral, “Endless Road to Coronation,” increases her secret technique level by 1 and ATK by 20%.