The Runic Disc system in Stella Sora is one of the game’s most creative mechanics — combining strategic loadouts with the charm of collectible music records. On the surface, they look like stylish vinyl albums with their own cover art and soundtrack, but in battle, these Discs define your team’s tempo, buffs, and long-term scaling inside Ascension mode.
Discs are not just background flavor. When used correctly, they can completely change the pace of a run by giving your Trekkers early elemental bonuses, damage boosts, or note-based synergies that trigger powerful Harmony effects.
At the start of every Ascension run, players can equip up to 3 Main Discs and 3 Support Discs to form a Record.
Think of it as your combat playlist — each Disc adds stat bonuses, melody-based triggers, and in some cases, even alters how your Trekkers interact with their elements.
Once you’ve started an Ascension run, your chosen setup is saved for that Record. The buffs you gain from Discs in your Main slots even carry over to other game modes — meaning a good Disc build doesn’t just help in roguelike runs, but across your entire account.
Melody & Harmony Skills
Every Disc has two key abilities:
Melody Skill: The main effect that is always active once equipped. This determines the Disc’s core identity (for example, boosting Ignis ATK or Ventus speed).
Harmony Skill: Conditional bonuses that only trigger when the right Musical Note pattern is achieved during a run. Harmony effects are where advanced builds shine — they often reward specific combinations of elements or skill types.
When you place a Disc in a Support slot, its Melody and Harmony effects won’t apply directly. Instead, it grants starting Musical Notes, helping you trigger your main Discs’ Harmony Skills earlier in a run.
Rarity & Frames
Just like Trekkers, Discs come in rarities that determine their potential and complexity.
| Rarity | Frame Color | Melody Skills | Harmony Skills | Support Effect | Notes |
|---|---|---|---|---|---|
| ★3 | Light Blue | 1 | – | Grants 1 Musical Note | Simple and reliable starter Discs |
| ★4 | Gold | 1 | 1 | Grants 2 Musical Notes | Balanced mid-tier setup |
| ★5 | Chroma (animated) | 1 | 2 | Grants 2 Musical Notes | Top-tier with advanced scaling |
5-star Discs feature parallax motion covers — not just cosmetic flair, but a mark of rarity that signals they hold two active Harmony slots. These are typically your long-term investment pieces.
Disc Affinities & Elements
Each Disc aligns with one of the six elemental affinities:
Ignis, Aqua, Ventus, Lux, Umbra, and Terra.
A Disc’s affinity determines which Trekkers benefit most from it.
For example:
- An Umbra Disc often boosts ultimate charge or crit-based abilities for Umbra Trekkers.
- A Lux Disc might enhance healing, shields, or support-type buffs.
Selecting the right elemental match between your Discs and your Trekker squad is crucial — misalignment leads to wasted stat bonuses and weaker synergy chains.
Disc Levelling & Crescendo
Discs can be leveled up to 90, and just like Trekkers, every 10-level milestone requires tier-up materials to unlock further progression.
Each Disc also has a unique Crescendo System, similar to Trekker Talents. Obtaining duplicate copies of a Disc increases its Crescendo Level, strengthening its Melody Skill. The maximum Crescendo level equals the Disc’s rarity:
- 3★ → 3 Crescendo Levels
- 4★ → 4 Crescendo Levels
- 5★ → 5 Crescendo Levels
A fully leveled Crescendo not only boosts its passive effects but can significantly improve consistency in triggering Harmony bonuses during Ascension.
Main vs Support Slots
A smart setup balances your Main and Support Discs.
Main Discs
Provide full access to their Melody and Harmony skills
Apply to every game mode that uses the same Record setup
Should focus on your primary team’s elemental strengths
Support Discs
Only grant starting Musical Notes and base stat buffs
Their active Melody/Harmony effects don’t apply
Best used to fill the note requirements for your Main Discs’ Harmony triggers
For example, if your Ignis Main Disc requires Aqua + Ignis notes to trigger its Harmony, you might equip an Aqua-aligned Support Disc to complete the pattern from the start of your run.
Disc Stats & Tags
Each Disc comes with two base stat bonuses — usually combinations of ATK%, DEF%, or HP%, depending on its rarity and affinity. These grow naturally with leveling.
Below each Disc name, you’ll see tags describing its role and synergy traits. Tags might look like this:
Lux / Support / Mark
That means the Disc buffs Lux Trekkers, enhances their Support skill, and improves Mark damage or application.
Learning to read and stack matching tags across your build is the secret to squeezing out maximum performance from your Record.
Disc Music & Presentation
Each Disc isn’t just a stat stick — it’s also a soundtrack.
They feature:
- A Main Tune, played during calm stages in Ascension (like Trade or Choice Domains)
- A Victory Tune, randomly selected and played after clearing an Ascension run
It’s a small touch, but it ties beautifully into Stella Sora’s world — reminding players that every battle is a song written by their choices.
Leveling Tips & Investment Advice
Prioritize 5★ Discs that match your primary element and team style. They have the highest Crescendo ceiling and better stat scaling.
Save mid-tier 4★ Discs for early flexibility — they’re perfect stepping stones when building note setups.
Use Support slots wisely. Even if a Disc’s bonuses don’t activate, their Musical Notes can make or break your first few floors in Ascension.
Don’t ignore stat synergy. An ATK-based Aqua Disc won’t help a Lux healer as much as an HP or DEF-based one.
Long-term, Discs feel like a secondary progression system, but mastering their setup is what separates efficient runs from chaotic ones.
Notable Discs (Player Favorites)
| Element | Disc Name | Rarity | Role |
|---|---|---|---|
| Ignis | Scorching Night’s End | ★4 | Balanced damage booster with strong Harmony triggers |
| Ventus | Sky, Flowers, Poem | ★5 | Excellent for crit-oriented Ventus teams |
| Aqua | Sunlit Blossom | ★5 | Great sustain-focused Disc for healer squads |
| Lux | Seed of Freedom | ★5 | Boosts recovery and ally DEF — key support Disc |
| Umbra | Wisteria Dream | ★5 | Crit scaling Disc ideal for Umbra Trekkers |
| Terra | Fortitude | ★3 | Early-game defensive Disc for tanks or sustain units |
The Runic Disc system captures what makes Stella Sora so unique: everything blends narrative artistry with mechanical depth. Each Disc feels like a piece of the world’s culture — music from an era where explorers like your Trekkers recorded their emotions into melody.