Hero condition becomes active when a player reaches rank 20. The condition system affects the frequency of your heroes’ skill usage; the frequency increases when the condition is good and decreases when it is not. A hero’s condition is shown on either team management or the hero setting screens, and the top right corner of the hero portrait also shows the condition without the percentage.

If you check the condition info on a hero’s settings, you can look at the graph that shows how the condition will change within the next 12 hours. Clicking the League icon will let you see the what the hero’s condition will be during the upcoming leagues, and the description at the top tells you how the condition will be for the next league.

Battles are heavily affected by skills, so it is important to manage your heroes’ condition in order to avoid any penalties in League and/or Adventure. It may not matter if you have enough strong heroes to cycle through while the other get back in good condition, but it can surely become problematic if you have very few heroes. Whenever you have a hero in bad condition, you can use a Condition Potion to bring them back up.

The item can be used from the bottom of the Condition Info screen. When used, the condition increases by one grade, and the effect lasts for 12 hours. The increased condition is indicated as a bar with diagonal stripes.

However, this is a temporary solution that does not really change the original condition graph. For example, the condition graph that shows a hero going from Bad to Terrible will be increased to Average-Bad with a Condition Potion for the next 12 hours; once that time is up, however, the condition will go down to whatever it would have been had you not used the potion.  

Thankfully, there’s no limit to the number of potions you can use, so you can use a number of potions so that the hero stays in the best condition for 12 hours.

There are many ways to obtain this Condition Potion; Exploration, the first stage of Challenge Dungeon, or at the Arena Shop for 100 Arena Medals. You can also make microtransactions and buy Bluestone Packages in the Shop menu.