C179

A rank 1 beast core could be exchanged for 10 pieces of low-grade prehistoric stones, and a low-grade 2-star beast core could only be purchased with 100 pieces of low-grade prehistoric stones.

In other words, he needed to kill ten Class 1 Demonic Beasts in order to exchange for a single Low Grade Two Demonic Energy Pill.

He needed 1000 low-grade 2-star beast qi pills