The room has several reality shifters and multi vers traveling beings. It has Bill Cypher from gravity falls, it has The collector from The owl house, professor Paradox a.k.a Time walker from Ben Ten. Many more, the space was made by a girl named Marie and other beings so that these powerful characters can find common ground with others. There's no violence allowed but obviously sometimes it happens, try not to get hurt, stay in one piece, and good luck.