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End of the demon world

This is the background of Stage 6 of Touhou Kaikidan (Mystic Square)
It's miscellaneous

Aether Mode only differs in the position of the slip-through floor
And the background is the final phase of the original

Music used:
music1(Original song)
https://youtu.be/FntunABQyrA

music2(Arranged version of ZUN)
https://youtu.be/PJj2ZqUmxFQ

music3("Touhou Gensou Maroku ~ Devil of Decline" to "Concerto for the Demon’s Burial")
https://youtu.be/PXHzIrbeXZ8