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Translation from Reddit.
Some translation attempts from /a/
Ichigo went to SS to host a funeral for captains like Yama and Unohana
Shunsui starts going over past events and the purpose of the ceremony
Soul funerals send shinigami spirits back into the earth
This is something in a textbook, but also a kind of "superstition"
Third seats and above can't return to the earth, so what do we do
Powerful spirits can't be left to float around SS forever, and there's another meaning to the soul funeral
During this ritual, the dead captains...
(Szayelapporo) appeared from hell to answer: fall into hell
Strong power has a price, and the price of pursuit of power is to fall into hell This is a kind of mercy, and merciful shinigami consistently send their companions to hell without knowing the situation
Rukia: Is this true? Captain Commander
Shunsui: I don't know whether or not it's true, I only just became aware of it myself
Szayel: You don't believe me? My presence is in itself the best proof that the balance has been broken
The powerful reiatsu of both Aizen and Yhwach that held down the gates of hell has disappeared
Because you keep sending powerful reiatsu to hell, hell can now open the gates In the middle
Szayel (impaled by thorns/spikes): You came quickly, Ukitake Juushirou
Ichigo: What are you pushing for? The ceremony is still...
Szayel: It's over. Didn't you people just kill the hollows of hell? Right in front of Ukitake
Well, I'll go back first, so think about it
After all, hell is all around you, and it's impossible to not be aware of it
Didn't you ever wonder why hell butterflies have the word hell in the name?