RubuskaBuild and Guide
Rubuska is a 6✦ rarity character from the Mineral afflatus who deals Reality damage and belongs to the Survival class.
Rubuska profile was last updated on December 11th, 2025.
To learn more about Rubuska check the sections below. Use the tabs to quickly switch to the kind of information you're looking for.
Profile
Review
Stats & Build
Synergy & Teams
Lore
Profile
1-target buff. Grants [Shadow Feast] to the target for 1 round. Restores (the user's Max HP x10%) HP to all allies.
Shadow Feast:
Pos Status. Clears all allies' [Shadow Cloak] points except that of the target. The target gains 20% of the cleared [Shadow Cloak] points; these additional [Shadow Cloak] points do not count toward the target's maximum [Shadow Cloak] points and they provide 80% of the additional Critical DMG/Ultimate Might. When this status ends, all additional [Shadow Cloak] points disappear.
✦✧✧
[Attack]
1-target attack. Loses (Current HP x10%) HP to deal 120% Reality DMG. This attack counts as a [Retribution].
Increases [Shadow Cloak] to all allies' [Shadow Friend] in value equal to 3% of the user's Max HP.
✦✦✧
[Attack]
1-target attack. Loses (Current HP x10%) HP to deal 180% Reality DMG. This attack counts as a [Retribution].
Increases [Shadow Cloak] to all allies' [Shadow Friend] in value equal to 6% of the user's Max HP.
✦✦✦
[Attack]
1-target attack. Loses (Current HP x10%) HP to deal 300% Reality DMG. This attack counts as a [Retribution].
Increases [Shadow Cloak] to all allies' [Shadow Friend] in value equal to 9% of the user's Max HP.
Retribution:
Special. Deals DMG based on 20% of the user's Max HP instead of ATK.
Shadow Friend:
At the start of the round, loses 10% Current HP. Rubuska converts 70% of this lost HP into [Shadow Cloak] points, up to 15% of Rubuska's Max HP when entering battle. This effect disappears when Rubuska leaves battle.
Shadow Cloak:
Each point of [Shadow Cloak] increases Max HP by 1. Every 200/300 points of [Shadow Cloak] increases Critical DMG/Ultimate Might by 1%.
✦✧✧
[Health]
Mass heal. Restores (Missing HP x25% + the user's Max HP x20%) to all allies. No critical chance for the healing.
Increases [Shadow Cloak] to all allies' [Shadow Friend] in value equal to 4% of the user's current HP.
✦✦✧
[Health]
Mass heal. Restores (Missing HP x25% + the user's Max HP x25%) to all allies. No critical chance for the healing.
Increases [Shadow Cloak] to all allies' [Shadow Friend] in value equal to 8% of the user's current HP.
✦✦✦
[Health]
Mass heal. Restores (Missing HP x25% + the user's Max HP x30%) to all allies. No critical chance for the healing.
Increases [Shadow Cloak] to all allies' [Shadow Friend] in value equal to 12% of the user's current HP.
Shadow Friend:
At the start of the round, loses 10% Current HP. Rubuska converts 70% of this lost HP into [Shadow Cloak] points, up to 15% of Rubuska's Max HP when entering battle. This effect disappears when Rubuska leaves battle.
Shadow Cloak:
Each point of [Shadow Cloak] increases Max HP by 1. Every 200/300 points of [Shadow Cloak] increases Critical DMG/Ultimate Might by 1%.
The Perky Piper
Insight IPrecognition
Whenever an ally loses HP, accumulate points of [Bloodtithe].
Insight I
All allies have [Shadow Friend] when Rubuska is present.
Whenever an ally reaches full capacity of [Shadow Cloak], Rubuska gains Moxie +1. Rubuska can reserve up to 3 excess Moxie (replenished at the end of the round if applicable).
The Perky Piper
Insight IIWhen entering battle, Max HP +5%.
The Perky Piper
Insight IIIWhen entering battle, grants all allies [Grace of Rubuska I].
When an ally is attacked, Rubuska restores (own Max HP x12%) HP to all allies, triggering up to 3 times per round. No critical chance for the healing.
Special effects
Shadow Friend:
At the start of the round, loses 10% Current HP. Rubuska converts 70% of this lost HP into [Shadow Cloak] points, up to 15% of Rubuska's Max HP when entering battle. This effect disappears when Rubuska leaves battle.
Shadow Cloak:
Each point of [Shadow Cloak] increases Max HP by 1. Every 200/300 points of [Shadow Cloak] increases Critical DMG/Ultimate Might by 1%.
Grace of Rubuska I:
Pos Status. When taking a lethal attack, the carrier is not defeated and recovers (Rubuska's Max HP x30%) HP. Disappears after trigger, unstackable, undispellable.
Rubuska doesn't have an Euphoria update yet. If it will be released, we will add it here.
Rubuska Portray
Portray detailsLv. 1:
Victory Belongs to "Rubuska the First"!: [Shadow Feast]'s duration is increased to 2. The amount of cleared [Shadow Cloak] points transferred to the target is increased to 35%. The proportion of Critical DMG/Ultimate Might gained from [Shadow Feast]'s additional [Shadow Cloak] points is increased to 100%.
Lv. 2:
Cheerful Piper: The maximum amount of [Shadow Cloak] points is increased to 18% of Rubuska's Max HP when entering battle. The proportion of [Shadow Cloak] points gained through [Shadow Friend]'s HP loss effect is increased to 100%.
Lv. 3:
Midnight Prank: At Incantation rank 1/2/3, Reality DMG dealt is increased to 180/270/450%.
Lv. 4:
Happy Piper: After an ally is attacked, the HP recovery for all allies is increased to (own Max HP x16%).
Lv. 5:
Happy Piper: For allies with [Shadow Friend], the amount of [Shadow Cloak] points required for every +1% Critical DMG/Ultimate Might is reduced to 100/200.
Insight 0
Insight 2
Review
The Bloodtithe archetype focuses on consuming HP and healing to generate it back. Rubuska is a healer for this archetype who specializes in the HP loss mechanic. She can grant [Shadow Friend] at the start of battle thanks to her Insight I, which decreases the health of all allies by 10 percent at the start of every round. Rubuska can then convert 70 percent of this lost HP into [Shadow Cloak] points. Each point increases your Max HP by 1, and every 200 or 300 points also increases your Crit Damage and Ultimate Might by 1 percent.
It’s not difficult to build up these points since both of her skills contribute. One of her skills is a mass heal, and she can also heal after an ally attacks, thanks to her passive, which automatically heals the entire team. This makes the Bloodtithe team very stable despite its core mechanic revolving around draining HP for buffs. That is not even all, because thanks to the Grace of Rubuska, which is already active from her Insight III when you enter battle, she can literally save an ally from death once. Thanks to this and her strong healing, she is essentially the safety net of the entire team while still contributing significantly.
Her Ultimate, “All Hail Rubuska the First”, uses all the Shadow Cloak stacks from the rest of the team and channels them into a single target, greatly buffing that character. In a typical Bloodtithe team, the usual choice would be someone like Nautika. It also heals all allies once again.
Rubuska is a straightforward unit if you already understand how Bloodtithe teams work. She is the passive support for the whole team. Once she is in battle, she is already doing her job. She drains HP from allies, builds Shadow Cloaks for buffs, keeps the team alive, and her ultimate enables strong burst damage.
Pros
Passive healing is perfect for a Bloodtithe team and she is the best healer for a Bloodtithe team.
Very low AP demand and can prevent allies from dying once.
She contributes steady Shadow Cloak stacking that boosts both survivability and damage for the whole team.
Provides strong burst support when her ultimate is paired with the right damage dealer.
Cons
Her buffs need a few turns to build up.
Stats and Build
Build 1 - Rubuska – High HP Bloodtithe
Prioritizes Max HP.
If you don't have Resonance Patterns unlocked, try this build with Placidity:
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Comments
The Wandering Improviser is Rubuska's best-in-slot option and a very good psychube for general Mineral supports, so it's worth building. 12–24% Healing Bonus, 16% Max HP, and an allied buff of 12–24% Ultimate Might is nothing to sneeze at. Unfortunately, this signature psychube is very hard to replace due to a lack of other good 6* healing options that work with her.
Melodies Old and New is a decent alternate option, as its 12–16% Healing Bonus and 8% HP help Rubuska perform her role as a healer. The 3–9% allied DMG Bonus, while not as potent as her BiS, still offer a nice buff to her teammates.
Faded Epitaphs is a more aggressive substitute if you're running Euphoria Eternity as your Bloodtithe DPS instead of Nautika. 8–16% DMG Bonus for all allies works well, and the 8% Max HP is very valuable since Rubuska's entire kit revolves around her HP.
Note: while other characters' Moxie storage effects are considered Force Fields and can therefore activate One with the Flow for extra Moxie, Rubuska's Moxie storage is coded differently and doesn't work this way.
Rubuska stats aren't available yet. They will be added soon!
Synergy & Teams
The teams below come from our Teams database and showcase ANY team with Rubuska present within in all content available in the game.
Lesbian Religious Trauma
Niche 1: HP Loss || Niche 2: FUA
Characters
About the team
Undeniably intensely powerful, the Bloodtithe team is something both safe and risky. Nautika and Semmelweis cause HP levels to bounce frequently, leveled out by Rubuska's healing, revive mechanics and Nautika's [Higge] and defensive buffs. It generates Bloodtithe quickly, allowing for 2 round "Divine Yoik" cycles that deal an absolutely ungodly amount of damage while under Semmelweis' Array and through Sentinel's powerful amping and consistent [Bloodtithe] generation. Flutterpage and Melania(E) can sometimes be used in place for Sentinel whereas Rubuska can be swapped out for Fatutu and Medicine Pocket(E) if needed.
HP Loss - Core
Niche 1: HP Loss || Niche 2: Support Core
Characters
About the team
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If you're looking for more team information, check our Team Database:
Rubuska Synergy information aren't available yet. They will be added soon!
Lore
Rubuska Lore information aren't available yet. They will be added soon!