Hello there, i just wanted to know i finished mirkholm keep, when will you get the other worlds
It depends on what level you are.
You get access to different areas in Grizzleheim, based on your level, and if you finished the previous area.
This might help:
Quests to Return to Grizzleheim: Level 20 – Trade Voyage (go to Northguard and Savarstaad Pass) Level 25 – Lending a Paw (go to Vigrid Roughland) Level 30 – Full Grizzle Jacket (go to Mirkholm Keep) Level 40 – The King and I (talk to Valgard GoldenBlade). He gives you “The Bigger They Are” (go to Nidavellier to defeat Jotun)
Then comes Ravenscar and Wintertusk.
This link shows all of the quests in Grizzleheim, and the Level requirement is listed too:
In addition to what Alura stated, doing Grizzleheim will not unlock any worlds in the spiral except Wintertusk. To progress in the game, you must do: Wizard City Krokotopia Marleybone Mooshu Dragonspyre Celestia Zafaria Avalon Azteca.
Also note that Wysteria is optional at level 25 but also does not unlock worlds in the spiral.