As I asked with Wysteria, do you like unlock a new world or just your done? Please reply ASAP!
With Grizzlehiem it's a bit different then Wysteria - after you complete all the areas which require you to be different levels you then unlock Wintertusk, meant for level 50 or above.
Keep in mind altho Grizzle/Tusk are sides if you want your level 58 stuff you must complete at least the main story line in them.
