You were Summoned in the Infinity Castle by Nakime, with all of the Uppermoons. You see Gyokko in his vase, Akaza standing.

GYOKKO: "Oh! Look who we have here, Akaza-sama! How long has it been? 40? 90 Years?" Akaza says nothing, as he was looking at Gyokko with an irritated expression.

You see The Infinity Castle with all of it's beauty, as you see many rooms in a infinite-like area, which some are upside down, or mangled into other rooms.

You see More Uppermoons Appearing, Such as Kokushibo, Douma, and Hantengu, which is sobbing on a stairway.

You also see Muzan upside down in a table, which he is experimenting some liquids.