Originally posted by knighttemplar1960:

There are nine realms in Norse Mythology, they are called Niflheim, Muspelheim, Asgard, Midgard, Jotunheim, Vanaheim, Alfheim, Svartalfheim, Helheim. . . . may not be connected to the world tree or to the rainbow bridge (that may be why a huge raven flies you to Valheim) and the reason

that you die if you sail over the edge.

Odin had severed Valheim from the world tree, so, it wouldn't be connected.
The may or may not part would be: Valheim may or may not have the capability to be reconnected to the world tree or does the "bifrost road thing" only have the ability to connect to places that the world tree is connected to.