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Past Evils of the Borehole Planet Disaster
Honkai: Star Rail · UPGRADE MATERIAL

Past Evils of the Borehole Planet Disaster

Used in supported upgrade goals for 12 records. Open a record to choose a target and calculate the exact requirement.

About Past Evils of the Borehole Planet Disaster

Material

Where to obtain it

  • Echo of War: Seclusion Zone

Used by the supported upgrade goals listed below. Requirements depend on the selected current and target levels.

WHERE IT FITS

Characters and equipment that use this material

Dr. RatioImaginary★★★★★

Dr. Ratio

Released Jan 17, 2024Imaginary single-target damage dealer whose Skill can trigger follow-up attacks. Consider Dr. Ratio when you can keep debuffs on the enemy he is targeting and teammates can attack that target to activate his Ultimate mark.Guide

Dr. Ratio is a five-star Imaginary character on the Hunt path. His Skill deals single-target damage and can trigger his Talent follow-up; his Ultimate marks one enemy so teammate attacks can trigger more follow-ups. Debuffs improve the Skill’s follow-up chance, so his damage plan depends on debuff coverage and focus fire.

SparkleQuantum★★★★★

Sparkle

Released Feb 6, 2024Skill Point-supporting Harmony character with action advance and CRIT DMG buffsGuide

Sparkle supports an ally by advancing that ally’s action and scaling their CRIT DMG from her own CRIT DMG. Her Ultimate restores Skill Points and her Talent raises the party’s Skill Point maximum, making her worth considering for teams that use Skill Points frequently and can make good use of repeated ally turns. The input contains two distinct ability descriptions for her, so the article describes the shared effects and avoids treating the alternate wording as additional effects to purchase.

Black SwanWind★★★★★

Black Swan

Released Feb 6, 2024Wind Nihility damage dealer who builds Arcana through damage-over-time applicationsGuide

Black Swan applies Arcana, a stacking Wind damage-over-time effect, and increases its pressure through enemy turns, allied DoT applications, and her Ultimate’s Epiphany state. Consider her when the team can apply DoT repeatedly and fights allow enemies to take turns, since Arcana’s main damage and additional effects resolve at the start of enemy turns.

RobinPhysical★★★★★

Robin

Released May 8, 2024Physical Harmony support who advances the team and adds damage during ConcertoGuide

Robin boosts all allies’ damage with her Skill, then uses her Ultimate to make teammates act immediately and enter Concerto. While Concerto lasts, she raises allied ATK and adds a fixed-crit Physical hit after each ally attack, but Robin herself cannot take turns or act until the state ends. Consider her when the team can make use of the coordinated action window and frequent allied attacks.

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