Many Worlds and races had met each other, and it was obvious that the conflicts immediately began in this case.
Previously, members of the Pillars could fight each other in areas of the World of Darkness or by visiting other Worlds using the portal system. However, no one would ever dare attack another World. It was suicide and war without a chance of victory.
However, after the merging of worlds, the situation changed dramatically. Many were still in shock and trying to understand the situation, but it didn't matter for some. They immediately headed for enemy territories when they realized that they could now avenge or reprisal against their enemies.
The worlds were not joined holistically. The Elf World was not entirely in the west or the north. Their former World was divided into several territories randomly joined to the rest.