World Border - the borders of the world на версии [1.12.2] [1.16.5]

WorldBorder is a mod that allows you to create a customizable world border, limiting the size of the world. This can prevent large file sizes or reduce the distance between players. 

When approaching the border, players will receive the following message:

Message when hitting the world border with enableLoop turned on.

When reaching the border with enableLoop turned off, players will receive a message and be teleported 10 blocks inside the border.