ARC-V Reactor

The ARC-V Reactor is a device that appears within Academia in the Yu-Gi-Oh! ARC-V anime.

History
The machine was briefly seen absorbing thousands of cards into itself. At the time, the machine was being observed by Leo Akaba. It's later revealed that the machine's purpose is to use the gathered carded people's life energies as fuel to fuse the four dimensions. There are also four capsules connected to the machine that Leo used to contain Yuzu Hīragi, Serena, Rin, and Ruri Kurosaki to transfer them into the reactor's core where they will fuse into their original self, Ray, who was Leo's daughter that got split into four fragments after the battle with Zarc.