Each Artifact has a main bonus that can't be changed and several random bonuses that can be changed multiple times. Random bonuses have rarity levels, with higher levels having better stats and lower drop chances.
Example of bonuses granted by the "Fan of the Five Winds":
● Guardsmen's strength (+26%) — main bonus.
● Army strength (+10%) — potential random rare bonus.
● Army strength (+20%) — potential random epic bonus.
● Army strength (+50%) — potential random legendary bonus.