Priest Hua made these bombs himself, using a thin bolt of Chaos divine thunder that burst from the Chaos and the powers of the five basic natural elements in Pan Gu world, based on the great Dao of evolvement inside his own body, over a long period of time.
A regular magic bomb would explode after one thunderous bang, and release all its power, destroy everything within its attacking rage. The strongest explosive force generated by the bomb at that very moment was the most important thing about a magic bomb. However, Priest Hua's magic bombs were based on the great Dao of evolvement, and were different. The three bombs seemed to explode just now, but in fact, the explosion was merely a start.