I Think During the time it is created and subdued we should be able inside of the crystal pvp Gamemode to choose what biomes we can pick. Like plains, desert, mushroom, badlands, snow the main biomes. And we can have a custom dueling system between it as in the mcsr ranked mod we can see they have custom rooms for individual fights between the two players, I think it should also allow that in such of one thing.
#The different biome types. And duels within the mod
knotty girder
hollow siren
There are duels, I can tell you that