Chaotic Lightning Cultivation

Song Zhong’s parents were the geniuses of the sect. But they were apparently killed while on a mission when he was barely 6. As he apparently did not excel in any of the 5 elements, in fact, all 5 elements are in balance in his body. Thus, our fatty is deemed to be tr*sh and does not deserve the respect his parents had.
He is allowed to have one task, to collect garbage of the sect until he reaches the initial test-age where he has to prove that he is worthy to stay in the sect.
Our fatty has no choice but to cultivate the only heritage his parents gave him. A mysterious black pearl.
Unfortunately for him, this pearl seems to be only useful for… collecting garbage…