Substance and Exhibition

It took less than three minutes for Gandaph to complete the dismantling. He dug out a fist-sized blob of a pitch-black substance with his bare hands, and it looked like he was kneading a black slime ball. It looked just like melted asphalt.

There was no subtlety, no mana aura, nothing. But Gandaph very cautiously put that mass into an obsidian box. He then put three layers of seals on the box. The inner seal was a gelatinous layer made of a Trapa Tortoise's shell while the other two layers were an array and a mana seal.

The seal wasn't powerful, but it had one property: It could seal mana!

The obsidian that Gandaph brought out was a relatively famous mana-repelling material that stopped mana from being sensed. As for the gelatinous matter formed after a Trapa Tortoise's shell was slowly cooked, it was used to seal off some special items. Its purpose was to stop mana from coming in, preventing mana erosion.