A City Aflame (Insane)
Collaboration Stages · Merc Storia: Inferno · 1/1
Energy150
Clear XP4,500
Base HP900,000
Map length5,200
Max enemies5
Spawn interval0.03s
Enemy traits 
Dark 
Floating 
Traitless
Dark Floating Traitless Crown difficulty
All enemies ×100% magnification
No restrictions
All enemies ×150% magnification
No restrictions
All enemies ×200% magnification
No restrictions
All enemies ×200% magnification
- Special · Rare only
Boss
Spawn timeline
Scroll sideways to see more. For enemies with a base HP condition, drag the orange circle to set when they appear.
Enemies 7 types
| Enemy | Count | Mag. | HP | Attack | First | Respawn |
|---|---|---|---|---|---|---|
| From the start 7 types | ||||||
 Doge Dark | 10 | 200% | 10,000 | 4,000 | 3.33s | 5.33–16.67s |
 Rei | 2 | 400% | 160,000 | 8,492 | 40s | 6.67s |
 Fuu | Unlimited | 400% | 120,000 | 7,768 | 126.67s | 40–53.33s |
 Serum | Unlimited | 600% | 55,200 | 3,600 | 6.67s | 30–36.67s |
| Rei | Unlimited | 400% | 160,000 | 8,492 | 113.33s | 30–43.33s |
| Rei | 3 | 400% | 160,000 | 8,492 | 113.33s | 0.07–1.33s |
| Serum | 3 | 600% | 55,200 | 3,600 | 113.33s | 0.67–3.33s |
 Wyvern | 1 | 100% | 380,000 | 6,555 | 40s | — |
| Wyvern | 1 | 100% | 380,000 | 6,555 | 120s | — |
 Healer Boss | 1 | 400% | 1,199,996 | 13,000 | 113.33s | — |
 Ms. Sign | Unlimited | 1200% | 120,000 | 12 | 900s | 900s |
| Once base HP ≤ 50% 2 types | ||||||
| Wyvern | 1 | 100% | 380,000 | 6,555 | Immediately | — |
| Rei | 1 | 100% | 40,000 | 2,123 | Immediately | — |
HP and attack include the magnification.
Clear rewards
If the reward chances add up to more than 100, the rows are rolled in order and each later row shares what is left.
Score rewards
Earned when your battle score reaches that value.