BRIGANDINE ABYSS Class Change Guide — Level 10, Level 20 Items & Leaders

Regular units can make their first Class Change at Level 10. At Level 20, advanced changes require a special Class Change item, which post-release review coverage says is obtained through expeditions in the quest menu. Faction leaders are exempt from the special-item requirement. Producer Masaru Saito also confirmed there are no hidden classes and that units have one or two Class Change stages.

Practical preparation loop

1. Level 10: check the unit in Organization Phase and choose the role you need for that squad slot.
2. Before Level 20: start running expeditions / quest-menu missions to obtain the Class Change items regular units will need.
3. Faction leader: do not assume the same special-item gate applies — leaders are exempt from the Level 20 item requirement.
4. Underleveled reserves: use Drill Training to catch up before promoting them (no exact Drill → Class Change formula is claimed here).

1. Open Organization Phase → unit → promotion/class panel.
2. The panel shows level thresholds and any extra requirements (items, quests). Follow the UI text for that unit — it is authoritative for that specific promotion.

Do not rely on generic thresholds alone; always confirm the specific unit’s promotion panel in Organization Phase first.

• Class Change applies to both Leaders and Monsters (official System page).
• The first Class Change point is Level 10 (post-release review corroboration).
• Later/advanced Class Changes at Level 20 for regular units are gated by a special Class Change item; review coverage reports those items are obtained via expeditions accessible from the quest menu.
• Faction leaders do not require the special Class Change item for their advanced change.
• Producer Masaru Saito stated there are no hidden classes and that units go through one or two Class Change stages.
• Explorations return resources, money, and EXP; strongholds support hiring Leaders and Monsters (official System).

Keep in mind the full class tree and the complete item catalog remain UNKNOWN from the sources available for this update.

1. Check the specific item or material the unit’s Organization Phase promotion panel lists.
2. Use the quest menu → expeditions to begin farming for the reported Class Change items (post-release coverage cites expeditions as the source). Prioritize expeditions that the UI or quest descriptions indicate reward materials.
3. Run explorations and missions to gather resources and EXP that support your progression.
4. Use stronghold options (hiring, upgrades) when relevant to unlock or support promotion paths.

Note: exact item names, drop rates, and guaranteed farming routes are not verified here.

Relevant pages: Quests & Training, Organization Phase, Equipment

Use this checklist to decide:

• Squad role: will the promoted class fulfill a needed role? Consult Classes for role descriptions.
• Timing: promote before content where the new role is required, but only after confirming requirements in Organization Phase.
• Equipment: check Equipment to confirm whether your current gear will remain usable.
• Command points: monster promotions can change Command Point cost — ensure your composition can absorb it.

• Eligibility — verify Level 10 or Level 20 (and any listed item) in Organization Phase for that unit.
• Requirement/item — have the exact item the UI lists or a plan to obtain it via expeditions/quests.
• Current role — confirm whether the new class improves the unit’s role in your squad.
• Skills and stat shifts — review the promotion panel; exact stat deltas per branch are not fully verified here.
• Equipment compatibility — check Equipment for compatibility after promotion.
• Reversibility — Class Change undo is not yet reliably verified; consult Missables before assuming a promotion can be undone.

• Assuming all units promote automatically at Level 10 or Level 20 without checking Organization Phase — the panel is authoritative per unit.
• Treating faction leaders the same as regular units and expecting to need the Level 20 item.
• Expecting known item names, guaranteed drop routes, or precise stat changes from community summaries — those details remain unverified here.
• Promoting multiple units at once without confirming equipment or command-point impacts.

• The unit will adopt the promoted class’s skills and stats shown in the promotion panel; exact per-branch stat or skill specifics are not catalogued here.
• Equipment compatibility and Command Point cost can change after promotion; double-check Equipment and your squad composition.
• If you promoted a regular unit and need the Level 20 special item for future advanced changes, resume expeditions/quests to obtain additional items as needed.

• Full per-class promotion tree.
• Exact Class Change item names and complete catalog.
• Drop rates and guaranteed farming routes for each item.
• Exact stat/skill changes for every branch.
• Whether Class Change is reversible in all cases.
• Complete equipment compatibility changes after each promotion.

For reversibility caution, keep Missables handy before treating a promotion as undoable.

Related pages

• Organization Phase
• Quests & Training
• Classes
• Equipment
• Missables