C501 The old devil leopard's hunting

A single drop of medium grade liquefied elemental essence was worth tens of thousands of Superior Grade Source Stone, equivalent to hundreds of millions of Low Grade Primeval Stone. This was an astonishing figure, causing Zi Chen's heart to ache for a long time. But if it was used today, even a drop of a billion Primeval Stone would absolutely be worth it.

The two of them were severely exhausted