Note, this page is a placeholder, a more detailed description will become available once the game has been fully fleshed out. (Written by an amateur)
Corruption is the status obtained by visiting or performing activities within a cave or a dungeon. The effects are permanent and can be removed or cured by a entertainer thrall. (Dancer Thralls). Unless the player chooses to reset their character by re-creating them through the main menu.
The longer time a player spends within the cave, the more corruption status they'll get, corruption lowers your health and stamina stats.
It's highly recommended that low level players stay out of cave systems and dungeons as it only becomes possible to obtain a thrall after level 10.
The effects of corruption can be seen as a purple color, covering a portion of your health and stamina bars.