The Spell Separating Us

In a magical world with different kingdoms two had split. They used to be allies until the Flowing Water Kingdom thought the Cold Wind Kingdom Was trying to kill them. It was a rumor, but a big one that no one had proof of being real or fake. To be safe the Flowing Water Kingdom casted a spell and made a huge barrier around the kingdom. There was a rule to the spell though. In a few years two people would be able to break the spell if they had the necklaces and stood by the one tree that was half way on the Flowing Water Kingdom and half way on the Cold Wind Kingdom. It's been over one thousand years now. And the information was passed down from generation to generation in the Water family, but the information also drifted to the Wind family.