BRIGANDINE ABYSS Class Change Guide — Requirements, Levels & Quest Items

If a unit reaches the level you expect for a promotion but the new class is unavailable, do not assume level alone is sufficient. First check the in-game class-change prompt and the Quest board for any required class-change item. Later or advanced branches are frequently tied to Quest rewards or special items in early reports; exact items and requirements are not fully verified.

• The official System description says a unit may be able to change class when it reaches a certain level. This is a may-not-guarantee statement — level is a condition the game uses, but it is not the only possible gating mechanic.
• The System page also confirms Explorations can return resources, money, and experience, and that strongholds support hiring Leaders and Monsters.

• Coverage and player discussion have reported Level 10 and Level 20 as commonly noted promotion milestones. Treat this as reported, not confirmed for every branch or every unit.
• Community and early coverage associate later/advanced class changes with special Quest/class-change items. Do not generalize this to mean every class or every unit requires an item.

1. Open the unit’s class-change prompt in the menu and check any text or required-resource indicators.
2. Open the Quest board and scan available/completed Quests for rewards that might be described as materials or promotion items.
3. Run Explorations — the System page confirms Explorations can return resources, money, and experience and player reports list Quests as sources of materials and equipment.
4. If the unit is a Monster, remember reports indicate promotions can increase Command Point cost; re-check your squad composition after promoting. See the squad-building guide: [/routes/squad-building/].

• Class changes interact with Quest rewards and training. For more on Quests and training mechanics, see [/quests-exploration/].
• If a unit’s class list is confusing, check the classes page for confirmed class descriptions and branches: [/classes/].
• For guidance on campaign progress and progression checkpoints, see the walkthrough: [/walkthrough/].
• For Monster-specific notes and confirmed Monster identities, see [/monsters/].
• Stronghold functions like hiring Leaders and Monsters are listed on the System page; for materials and upgrade notes see [/stronghold-upgrades-materials/].

• Exact names of class-change items, precise locations, drop rates, quest locations, success requirements, guaranteed rewards, and full item catalogues are not verified. The current research packet keeps later class-change items connected to Quests but does not provide a complete item list.
• A full retail roster of items and confirmed farming routes has not been verified; do not rely on any single player-reported route as guaranteed.

• Answer-first: if your unit has the required level but a later class is unavailable, check the class-change prompt and the Quest board for an item requirement. Level may be necessary but not always sufficient.
• Use Explorations and Quests as potential sources of required materials, but expect variability and unverified drops.
• If promoting Monsters, watch Command Point costs and adjust squads using the squad-building resource: [/routes/squad-building/].

• Official statements referenced are from the game’s System materials: they state level-based promotions are possible but do not list a complete item catalogue.
• Reported milestone claims (Level 10 / Level 20) and Quest-item associations come from early coverage and community discussion; these are reported observations and remain to be fully verified.

For more on class branches and details once verified, check [/classes/], and for Quest and training systems see [/quests-exploration/].

The first class-change milestone is Level 10, and most unit classes have another progression at Level 20. Later or advanced class changes may require special items connected to the Quest system. See the Classes guide for the level milestones and squad-cost context.

The confirmed connection is the Quest system. Use Quests when a later class is gated by a class-change or ascension item. The published information does not provide a complete item-name list, drop-rate table, or guaranteed farming route, so this page keeps the answer focused on the decision players need to make.

Reaching the level milestone makes a unit eligible for the relevant progression check, but it does not guarantee that every advanced class is immediately available. Monster class progression can branch, and the next branch may depend on an item. A promoted Monster may also require more Command Points, connecting the item decision to the Squad Building guide.

• Confirm the intended class branch.
• Check the Monster’s role in the current squad.
• Check the possible Command Point increase.
• Recheck the squad budget.
• Consider whether another unit needs the item more urgently.

The Stronghold Upgrades guide covers the wider campaign systems that support progression.

Class-change / ascension items are connected to the Quest system. The published information does not establish a complete named-item or drop-location list.

If the unit has reached the required level, check whether the next class requires a special class-change or ascension item obtained through Quests.

Later progression around Level 20 may require class-change items; the exact requirement depends on the class progression.

Monster class progression can branch, so inspect the intended role and available progression before using an item.

Monster promotions can increase Command Point cost. Recheck the squad budget after promotion.

Sources: NIS America — BRIGANDINE ABYSS System, NIS America — Producer Letters, and the Classes guide.