| Operation | Story | Trivia |
| OF-6 Killer Queen
|
Heart of Surging Flame: Main Stage Previous OF-5 Next OF-ST4
|
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| The true villains always appear at the worse possible moment. Naturally, that's the best possible time for moment for them. Unable to deploy some Operators on the field. | |
Information
| Recommended level | Elite 1 Level 15 | ||
|---|---|---|---|
| Sanity | Drill Plan | EXP | LMD |
| 20 | 1 | 200 (240) | 200 (240) |
| Unit Limit | Initial DP | Life Points | Enemies |
| 8 | 10 | 3 | 49 |
Drops
| First clear | Special | ||
|---|---|---|---|
| Guaranteed  20 Guaranteed  5 |
Enemies
| Normal | Hound Pro ×10, Infantry ×13, Ergate ×13 |
|---|---|
| Elite | Agent ×5, Rockbreaker ×8 |
Operators
The pre-deployed Operators will become unusable if they are present in the squad.
| Pre-deployed | Schwarz (Elite 1 Level 20,  Sharp Eye Level 4) |
|---|---|
| Additional information | |
| Schwarz is considered to have 50% Trust. | |
Information
| Recommended level | Elite 1 Level 15 | ||
|---|---|---|---|
| Sanity | Drill Plan | EXP | LMD |
| 28 | 1 | 280 (336) | 280 (336) |
| Unit Limit | Initial DP | Life Points | Enemies |
| 8 | 10 | 3 | 49 |
Drops
| First clear | Special | ||
|---|---|---|---|
| Guaranteed 28 Guaranteed 7 |
Enemies
| Normal | Hound Pro ×10, Infantry ×13, Ergate ×13 |
|---|---|
| Elite | Agent ×5, Rockbreaker ×8 |
Operators
The pre-deployed Operators will become unusable if they are present in the squad.
| Pre-deployed | Schwarz (Elite 1 Level 20, Sharp Eye Level 4) |
|---|---|
| Additional information | |
| Schwarz is considered to have 50% Trust. | |
Information
| Recommended level | Elite 1 Level 15 | ||
|---|---|---|---|
| Sanity | Drill Plan | EXP | LMD |
| 0 | 1 | 0 | 0 |
| Unit Limit | Initial DP | Life Points | Enemies |
| 8 | 10 | 3 | 49 |
Drops
| First clear |
|---|
3 Stars  |
Enemies
| Normal | Hound Pro ×10, Infantry ×13 |
|---|---|
| Elite | Agent ×5, Rockbreaker ×8, Ergate ×13 |
Operators
The pre-deployed Operators will become unusable if they are present in the squad.
| Pre-deployed | Schwarz (Elite 1 Level 20, Sharp Eye Level 4) |
|---|---|
| Additional information | |
| Schwarz is considered to have 50% Trust. | |