Eternal Sleep: He sleeps to prtect reality from himself
[Waking]: Acts as 自分's "finishing move" at th end
[Waking]: Releases his [Dream] into reality
[Dream]: Everyone is dead except for 自分
After [Waking],: he sleeps again, becoming immortal again
[Discrepancy]: While being ripped apart in the waking world, 自分's dream-self is fine, & so he's also fine even as he turns into a puddle
This "puddle" forms into countless sword shapes, cutting 相手 & getting ripped apart while never dying himself
Until at the end of the confrontation, 自分 sees beauty in 相手's soul: "You're too kind" 自分 says at the end as 相手 makes the mistake of [Waking] 自分 up