After reaching the fourth tier, Du You found that the drop rates were significantly higher than before, and each sphere contained more Crystal Coins, which were no longer as scarce as they used to be.
"With both gains and losses accounted for, the profits from hunting not only haven't decreased, they've actually increased if you kill quickly. Although there are fewer monsters above the fourth tier, the drop rate of Crystal Coins has definitely increased significantly,"
After hunting for a while, Du You came to this conclusion. Now, hunting these fourth tier Mo Dans, he could almost get a sphere for every two killed. Moreover, virtually every sphere yielded over a hundred Crystal Coins.