This boss was the first to give me some real trouble! Just keep the pressure on her by staying close in the first phase to down her pretty quickly.
The second phase is where it gets much tougher. She makes use of her illusion techniques and the butterfly projectiles will trip you up at best and deal massive damage at worst. I highly suggest saving all restoration items for the second phase, using your resurrection in the first if you have to.
Shurikens are helpful for dealing good posture damage if you can hit her midair.
Snap seeds are nice to have for the fight, but not required. They will only eliminate illusions that are in your vicinity.
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