[I'm probably gonna have to adjust this later...]
Those who enter the temple notice a wide stone obelisk sitting near the back of the room. At the base of it is a metal plaque that reads:
Sealed away are the souls I tore from eternal Darkness. If you are chosen and have accepted your fate, come forth, and the seal will release unto you one final challenge.
[Upon inspection]
A great number of names a carved into each side of the Obelisk. Among the countless sea of names, your eyes are immediately drawn towards a single one. Though you have no memory of it whatsoever, it feels incredibly familiar to you.
[Insert any actions/reactions for before the combat here.]
[Upon interaction (feel free to fill this part out with your own action)]
The Obelisk begins to glow, and the room is transformed into a vast, illusionary space. [Similar to
this , without the tree or doors. (Nothing changes from the outside of the temple.)]
Out from the obelisk appear 8 figures, visibly still corrupted by Darkness.[If your soul is among them and you're present inside the temple, you feel a strong sense of familiarity coming from it.] It seems that the seal is still affecting some of them, preventing them from recovering their full strength. It's clear they intend to fight.
Hitsugaya Tōshirō [Upgrade hasn't come yet, but preemptively Reduced to 6-B by the seal]
Han Jee-Ha
Sauro [Reduced to 6-B by the seal.]
Ba
Uchiha Obito (Tobi Key)
Chell [Too OP, sealing failed]
SCP-096
Anai Miu [Time hax restricted, and speed reduced to Relativistic by the seal.]
The remaining souls are stay inside the obelisk for now.
[You don't have to beat them, just weaken them a bit, and you'll be able to reclaim them. Alternatively, if you appeal to the soul's personality, they might start to fight back against the corruption from the inside.]