Grizzleheim may be experienced at different levels of game play and does not progress the same way as other worlds on the Spiral. Instead, Grizzleheim is a parallel world and a place where players return at various levels of experience.
Areas of Grizzleheim are on par with Wizard City, Krokotopia, Marleybone and MooShu. For a higher level player, working your way through these easier areas can be a little tedious, but you'll progress quickly due to your strength and in no time you'll be facing formidable enemies.