"Besides elemental crystals, I also have many Silver Secret Treasures and treasures from the Earth Element Realm..." Abyss Lord Sagus's voice carried over from afar.
"Silver Secret Treasures and treasures from the Earth Element Realm?" Zhang Tie pretended to consider it for a moment, then opened his jaws like a lion. "That could work too. But if you want me to fight a Phantom Nine Transformations knight, I'll need at least a hundred Silver Secret Treasures!"
A hundred Silver Secret Treasures—did he think they grew like cabbages? Of course Sagus was no fool. Silver Secret Treasures were different from elemental crystals. Elemental crystals were precious overall, and the human race did not possess as many elemental crystal mines as the Devil Race, but human knights could generally still maintain a balance between the supply and demand for elemental crystals. For elemental crystals, the human race could also call upon more knights to explore and serve in the Earth Element Realm, which would strengthen the forces of human knights there. A hungry Magic Beast was the most dangerous kind of Magic Beast; the same principle applied to human knights. The most important reason Sagus had been willing to give Zhang Tie so many elemental crystals just now was because he knew that, even if Zhang Tie held those elemental crystals, he could not immediately turn them into something that would raise the combat power of human knights. Elemental crystals alone could not pile up knights, and a knight's need for elemental crystals was not limitless. The amount one could absorb within a certain period was even more limited. Silver Secret Treasures, however, were different. The moment he handed them over and they fell into the hands of human knights, they would bring an immediate and tremendous increase in the strength of