Spend gold to instantly level up your characters. Amount of gold required also scales with the character levels. Cost will increase in relation to the character’s current EXP to the next level. The amount to level up scales based on the amount of EXP needed for the character’s next level. It’s cheaper to train a character halfway to the next level than someone who hasn’t earned a single exp yet. You cannot exceed the level of the current highest level character in your army.