Aside from that authentic treasure of heaven and earth that Rezen consumed to have a supreme resistance to poison, there was also an abundant amount of contaminated stones nearby and he naturally wouldn't waste them
As such, in excitement, Rezen harvested one contaminated stone after another. The number was simply not in the hundreds or thousands. It should be tens of thousands of contaminated stones and it could even reach hundreds of thousands!
Of course, their equivalent is not exactly hundreds of thousands of low-grade mana stones considering that the farm absorbs the pure energy these stones possess. As for the contaminants, they are simply 'stored' by the farm and it cannot fully absorb them
Only when the farm was upgraded to a certain extent could it also convert or absorb these contaminants as if they were pure energy
