Master Road Dungeons
As this video shows, any character can enter any Master Road, it's just that specific Master Roads are required for specific advancements. FlareKyn (talk) 12:17, 19 December 2019 (EST)
Um...
It's not just the last stage. All stages require that the previous stage be unlocked before you can work on them. FlareKyn (talk) 13:13, 23 December 2019 (EST)