Mission: Slay Akaza!
The Hidden Grail War
Collaboration Stages · 4 stages
When it opens
Limited time · Sep 25, 2026 – Oct 5, 2026
| # | Stage | Boss | Enemies | Rewards | Base HP |
|---|---|---|---|---|---|
| 1 | 穏やかな日常を願う少女 | - |      |  5% Score  ×35,0006,500 pts ×25,0005,000 pts ×15,000500 pts | 5,000 |
| 2 | 犯した罪と昏い闇 | - |      | 10% Score ×50,0007,000 pts ×30,0004,300 pts ×20,000500 pts | 15,000 |
| 3 | 影との融合 |  Boss Rin Tohsaka |    | 25% Score ×75,0006,400 pts ×50,0004,000 pts ×25,000500 pts | 30,000 |
| 4 | 新たな春のその先へ |  Boss Gilgamesh 10% |    | 45% Score ×150,0006,200 pts ×100,0002,000 pts  500 pts | 80,000 |