Chapter 317: Surficial Tundra VI

'This crystallized energy stone...'

Grimm anxiously removed the energy stone from within the rib cage and placed it in his palms. It had a refreshing feeling as he held the stone. The flower that emitted the fragrant aura of death was hiding in this energy stone.

It was apparent to Grimm that this energy stone was not a naturally occurring item. Most likely, it was the Energy Core of some kind of creature.

Similar to the Lava Giants, there were lots of creatures in the Endless World that used this type of Energy Core as a source of energy for their body's functions. Though, fundamentally speaking, it still belonged under the category of passive evolution. It's just that the creatures' evolution came from its' Energy Core, not from its' cells.

In fact, the concept of Millie and Grimm's Ice Marrow Crystallization ability was closely tied to the Energy Core from these creatures' bodies.