In Kingdom Story: Brave Legion, Officer Fusion allows you to sacrifice four surplus Grade A officers alongside a gold fee to roll a new officer from an elevated pool, with a chance to recruit a Grade S unit.

Requirements for 4-to-1 Grade A Fusion

Before attempting a fusion, your roster must meet specific system conditions:

  • Matching Tiers: All four sacrificed units must be base Grade A officers. Standard bracket fusion does not allow mixing tiers.
  • Unlocked Availability: Units assigned to active campaign squads, defensive arena formations, or protected by a security lock cannot be selected. Remove active units from battle slots and unlock them before opening the fusion menu.
  • Gold Reserves: Each 4-to-1 fusion charges an in-game gold fee. Maintain enough gold reserves to cover stage enhancements and gear upgrades alongside fusion expenses.
  • Roster Check: Verify that selected fodder officers are not required as components for Officer Exceeding or core members of faction teams.

How to Execute an Officer Fusion

Navigate through the city hub to combine your units:

  1. Open the officer management menu from the main city screen and select the Fusion tab.
  2. Place your primary Grade A sacrifice into the main slot.
  3. Select three additional Grade A officers to fill the secondary material slots.
  4. Review the gold cost and the resulting tier preview to ensure no vital squad members were chosen.
  5. Confirm the fusion prompt to consume all four officers and generate the new unit.
  6. If the combine yields a desirable Grade S or key Grade A officer, immediately lock the card in your barracks to prevent accidental consumption in future cycles.
Fusion ComponentSpecificationPlayer Action
Primary OfficerGrade A unitSelect an unneeded duplicate or low-priority character
Secondary Material3x Grade A unitsEnsure none are locked or slotted in defense squads
CostStandard gold feeVerify sufficient gold remains for ongoing roster upgrades
OutputRandomized Grade S or Grade A unitLock valuable outcomes immediately in your inventory

Managing Outcomes and Fodder

A 4-to-1 fusion does not guarantee a Grade S character. Because the outcome draws from a randomized pool, the combine can produce another Grade A officer instead.

  • If you receive a Grade A officer: Treat the outcome as recyclable fodder for your next fusion attempt rather than a complete loss.
  • If you receive a Grade S officer: Lock the unit immediately, then assess its skills and faction alignment for inclusion in your campaign line-ups or PvP arena teams.
  • Sustaining fodder: Collect replacement units by clearing standard campaign stages, completing daily quests, and using general recruit scrolls. Grade B and Grade C officers gathered through routine gameplay can also be leveled and ranked up into Grade A fodder to keep the fusion cycle running without spending premium currency.
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Emily Johnson

Emily Johnson

Emily writes practical mobile strategy guides with a focus on resource planning, base progression, and the early decisions that shape a long-term account.