If you leave a village completely alone for an extended period, its level will gradually decay. This allows you to cycle through your islands and keep the villages at a manageable, highly profitable tier.
The Barbarian Village operates on a private Player-versus-Environment (PvE) mechanic. Your interactions with a village do not affect the barbarian levels of neighboring players on the same island. ikariam barbarian village attack guide
Every time you successfully defeat the village, it immediately gains one level. The barbarians then enter a cool-down period to rebuild before they can be attacked again. If you leave a village completely alone for
Do not attack a Barbarian Village if: