"interesting gadget." Tang Yu didn't care about Hu Dongchen's despair. He had an interesting expression. After destroying the explosion effect of blood red thunder with the industrial fire, it turned into a pure blood crystal.

this kind of crystal must be very helpful to Xiaohuo.

Tang Yu thought in his heart.

"how is this made?" Tang Yu asked curiously.

"when this thing appeared in our Heiyan City, it caused a lot of people's panic, including me. They were very worried that this thing would destroy their blood vessels, resulting in the inability to improve or even reduce their accomplishments." Chen said sheepishly.

"and then?" Tang Yu asked with a frown,...