Although the Frozen Bloom was a great elixir for increasing Internal Energy unconditionally, once it fused with the Violet Plum Core, it would directly exhaust most of its energy in that fusion process.
As such, the Frozen Plum Core was more of an overtime generator rather than a periodical booster, and that was exactly what Leo was betting on, but…
'Of course.'
Once Leo cleared his mind and used his Internal Energy to scan the Core, what he found wasn't as pleasant as what he hoped for.
The energy generation process was far too slow!
It wasn't that Leo had miscalculated how slow it actually was. Rather, it was clearly mentioned in the novel that the process was fast enough to compare it to a daily energy pill dispenser, it just didn't seem to be the case now.