Soulstone Plains

 is an end-game location encountered in Blade & Soul, and is part of the warring factions Cerulean Order and Crimson Legion questline. It works just like as a no-man's land and a daily battlefield for these Factions. It's also the best place to farm soulstones and Faction related materials.

Location
It's located south of Zaiwei's gate, in the southernmost part of Silverfrost Mountains map. Players can just walk into there or, if wearing the Faction uniform, they can windstride to the respective Faction Camp.