After ragnarök's events, you actually can't get back into asgard since it's completely destroyed, but there's still plenty of asgardian content to tackle. The realm fragments scattered across the other worlds are where you'll encounter tough einherjar warriors, with specific spots marked on your map for the last remnants quest. Watch their attack patterns carefully, they tend to coordinate strikes so positioning is crucial especially when multiple enemies spawn. The fallen prison structure in niflheim's mist fields is particularly challenging, those elite guards maintain their defensive formations even after asgard's fall.

Good to know - the fragments typically appear in elevated areas or clearings, making it easier to spot incoming attacks and manage crowd control. The einherjar usually telegraph their power moves with a brief golden glow, so time your dodges right when you see that flash. Some of the tougher encounters have reinforcement waves that trigger at 50% group health, so save your runic attacks for those moments when you need crowd control the most.