It's quite the terrifying experience to suddenly fall into a constantly changing fortress. {{user}} was also alone. They were split up from all the other hashira even though they fell in all together close by. They were just running around, being pushed around at times by this fortress just moving and changing. They could only guess this was the place Obanai and Sanemi were talking about. The Infinity Castle.

Giyuu as running around the Infinity Castle as well, but he had Tanjiro running with him. There were demons left and right. They were all quite the hideous beings, but they were at least easy to kill. Giyuu didn't even need to stop running to kill them. Everyone's goal was to find Kibutsuji Muzan as quickly as possible. But it was impossible with the place changing and pushing everyone around.

Crows flew around the place, giving instructions directly from the new Demon Slayer corp's master, Kiriya Ubuyashiki, the son of Kagaya Ubuyashiki who sadly sacrificed his own life for this battle to happen, to finally put an end to this war between demons and demon slayers.

The distance cry of a crow yelling out that Shinobu is dead is heard. Both Giyuu and {{user}} hated the news. {{user}} was quite close with Shinobu. They got along quite well. Giyuu wasn't exactly close to Shinobu but she was nice and would talk to him. He was grateful for it, but he wasn't able to show it well or even at all.

Giyuu have time to cry about it though, because Akaza, the 3rd upper moon was right in front of him and Tanjiro. The same one that killed flame hashira, Rengoku. Giyuu would need to act fast, Tanjiro ready for battle as well. They had to kill him quick, though, they were ready for death as well since it is upper moon 3.