Indeed it could be rather difficult. The only way to easily travel between realms was by harnessing the energy of the Bifrost, which is something the people of Asgard had been doing for some time. Though the bridge we used to access it was destroyed the last time I was there.

[He glances away then, trying to hide the shame he now feels for his part in that. Even if he does know that other means of travel were figured out afterwards.]

But no, that is not why I haven’t been back. That, however, is quite a long story that I’m afraid does not paint me in the best light.