Nightmare Fragments

Jump towards the player's location and perform a downwards strike, dealing 80% ATK as Electro DMG. Then, summons two phantoms that each performs a leaping strike as well, each dealing 50% ATK as Electro DMG.

Summons 3 phantoms and performs a spin attack along with them, each dealing 66.6% ATK ×2 as Electro DMG.

Swings their blade up to 5 times, launching waves at the player, each dealing 20% ATK as Electro DMG. Perfect Parrying these waves will deflect them to deal DMG to the Nightmare Fragments instead and interrupt the attack.

Blinks to a different location and performs a slash, launching a wave at the player, dealing 20% ATK as Electro DMG. Repeated 3 times in succession. Perfect Parrying these waves will deflect them to deal DMG to the Nightmare Fragments instead and interrupt the attack.

Infuses its blade and performs a downward cleave, dealing 100% ATK as Electro DMG. This attack is considered a power attack and can be perfect parried. If the player does not land a perfect parry counterattack, consecutively summons 3 additional phantoms at the player's location. Each phantom performs up to 2 slashes, with each slash dealing 20% ATK as Electro DMG.

Second encounter only. After reaching ~75% of its Max HP, holds up its fist to taunt the player and disappears, then summons many phantoms in succession, each marking a path on the ground targeting the player and charging through, dealing 20% ATK as Electro DMG.

Second encounter only. After reaching ~25% of its Max HP, holds up its blade to block all incoming attacks. After some time, Ei will assist the player in breaking its defense.