Rubuska
Rubuska is a 6★ Mineral Arcanist in Reverse: 1999. Below are the exact Insight materials needed to ascend them, plus other Mineral Arcanists to build alongside.
Data updated: 2026-07-11
Rubuska — Review & Analysis
Rubuska is an S-tier healer-buffer (Mineral, 6★): her second skill delivers a team-wide heal scaling off lost HP plus a share of her own Max HP, while her Insight III passive auto-heals the whole party whenever an ally is struck — steady, crit-independent sustain. Beyond healing she works as a team backbone: she constantly feeds Shadow Cloak to Shadow Friend, generates her own Moxie from that, and her ultimate grants Shadow Feast to enhance a single carry. At heart she is a pure survival support who deals almost no damage herself.
- Two stacking heal sources: the group heal on skill 2 scaling off Max HP, and the Insight III passive that auto-saves the party up to three times per round — both crit-proof and thus very consistent.
- Doubles as buffer and Moxie battery: she steadily loads Shadow Cloak onto allies, generates her own Moxie when it caps, and her ultimate grants Shadow Feast to enhance a carry.
- A 6★ S-tier base plus the +5% Max HP passive makes every HP-scaling effect (heals, buffs) hit harder.
- Her Mineral Afflatus is countered by Star (takes +30% DMG), which is risky since her entire kit scales off her own HP.
- Stacking-dependent kit: she needs allies to lose HP to build Bloodtithe and needs Shadow Cloak to cap before she generates Moxie, so she ramps slowly and demands a synced team; she also deals almost no damage herself (skill 1 is single-target and costs her own HP).
Level skill 2 (the group heal) first to maximize sustain, then the ultimate; leave skill 1 last since it only triggers mechanics. As every effect scales off Max HP and cannot crit, pick a Psychube leaning toward Max HP / healing efficiency and avoid crit-oriented ones entirely. Push her Insights up to Insight III as early as possible to unlock her second, automatic heal source.
Overview
Base Stats (max level)
| Base Stats (max level) | Lv.1 | Lv.30 | Insight 1 · Lv.40 | Insight 2 · Lv.50 | Insight 3 · Lv.60 |
|---|---|---|---|---|---|
| HP | 1,774 | 2,693 | 4,277 | 6,257 | 7,207 |
| ATK | 241 | 367 | 582 | 852 | 981 |
| Reality DEF | 86 | 131 | 208 | 304 | 350 |
| Mental DEF | 86 | 131 | 208 | 304 | 350 |
Rubuska — Skills & Incantations
Midnight Mischief
Incantation “Insight II: 1-target attack. Loses (Current HP x10%) HP to deal 300% Reality DMG. This attack counts as a 【Retribution】. Grants (the user's Max HP x9%) points of 【Shadow Cloak】 to all allies' 【Shadow Friend】.”
Shadow Guard
Incantation “Insight II: Mass heal. Restores (Missing HP x25% + the user's Max HP x30%) to all allies. No critical chance for the healing. Grants (the user's Current HP x12%) points of 【Shadow Cloak】 to all allies' 【Shadow Friend】.”
Victory Belongs to "Rubuska I"!
Ultimate “Insight II: 1-target buff. Grants 【Shadow Feast】 to the target for 2 rounds. Restores (the user's Max HP x10%) HP to all allies.”
Inheritance - Happy Piper
Incantation “Insight III: When entering battle, Max HP +5%.”
Skill Quotes
“Hear their whispers.”
“Hear their whispers, see their wings as they flutter skyward.”
“Hear their whispers, see their wings as they flutter skyward, in the serene moonlight.”
“The flute's gentle tune drifts forth.”
“The flute's gentle tune drifts forth—an ancient lullaby.”
“The flute's gentle tune drifts forth—an ancient lullaby, its melody echoing the longing between the living and the departed.”
“No need to rush—everyone will be granted an audience to pay homage to her.”
Insight Materials
Insight 1
Insight 2
Insight 3
Resonance Materials
All 14 Resonance levels
Recommended Psychubes
Where to Get
Teams with Rubuska
Melania and Regulus both key off Moxie and Ultimate — the faster Moxie fills, the more often their Ultimates fire. Vila carries the same Moxie/Ultimate tag and adds Heal + Sturdy so the chain never stalls. Rubuska closes the loop with a Moxie-tagged heal that keeps everyone topped up between Ults.
Teams →
Semmelweis and Getian both drop an Array and tag Moxie — placing them together means their Array effects and Moxie generation overlap on the field instead of competing for the same square. Sentinel and Rubuska both carry Bloodtithe, converting the extra Crit/Heal actions the Array encourages into a shared resource pool.
Teams →
Tuesday, Semmelweis and Getian all tap into Array together with Poison — combining it across three kits at once outperforms any single carry doing it alone. Kiperina keeps the line-up alive with Shield so that payoff has time to land.
Teams →Sentinel, Rubuska and Moldir all tap into Bloodtithe together with Crit — combining it across three kits at once outperforms any single carry doing it alone. Kiperina keeps the line-up alive with Shield so that payoff has time to land.
Teams →
Nautika and Semmelweis both spend HP as a resource instead of hoarding it — Nautika's Incantations trade her own Current HP for extra Reality DMG, and Semmelweis's Ultimate costs every ally 20% Current HP to drop the 【Blood Domain】 Array. Sentinel and Rubuska both carry the same passive that turns any ally's HP loss into shared 【Bloodtithe】, so every point the front two spend feeds the Bloodtithe that Sentinel cashes in on 【Dread Bullet】 bursts and Rubuska turns back into team healing.
Teams →
