This idea arises from the common complaint that is 'knight is broken/op'. The idea will partially tackle said complaint as it depletes the effectiveness of a core knight item. The reason for the (knight only) is that the bomb is unfairly versatile(low price, many uses) compared to other explosives in the game. For example, the bomb arrow,exclusive to the archer class, costs twice the amount compared to the bomb. Hence, the bomb arrow is more difficult to obtain. The amount by which the AoE is decreased will depend on opinions of the dev's and the community.