The short answer: Phase one rewards restraint. Preserve spells and vessel energy for the much faster second phase and stay close enough to read the blade arcs.
00 · FIELD DEMONSTRATION
Watch the timing, then try it
Use this when you need the secret-area route as well as phase-two spacing. The Duskveil tips begin at 09:02.
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Cannot access YouTube? The written preparation, rules, and punish windows below remain a complete standalone guide.
01 · PREPARE
Before the attempt
- Finish other Purple Cloud quests before the arena.
- Bring poison cures.
- Use a reliable stagger spirit.
02 · READ
Three rules that solve the fight
- Spend minimal resources in phase one.
- Stay under or beside long-range blade waves.
- Reset when the camera loses the boss.
03 · PUNISH
Reliable punish windows
- End of the beak slam chain.
- Landing after aerial blade wave.
- A stagger early in phase two.
04 · RESET
Most common run killers
- Burning all mana in phase one.
- Running far enough to make projectiles harder.
- Entering before side quests are resolved.
Note: patches can change numbers, while move recognition, punish windows, and resource planning usually remain useful.