Aimed at the giant beast with the heavy crossbow bolt!
It has extremely strong penetration power, and if it manages to pierce the body of the giant beast, the arrowhead of the bolt will directly explode, causing internal damage to the beast!
This thing is practically a low-level armor-piercing shell!
"This blue-grade delayed explosive heavy crossbow bolt requires relatively expensive materials. Each one requires a piece of blue-grade iron and a piece of blue-grade saltpeter," Ma Hongwei explained. "The materials were provided by Li Wenxi."
Blue-grade iron and blue-grade saltpeter...
Speaking of blue-grade saltpeter, Xu Xin remembered he still had a piece.
Back then, he had used blue-grade saltpeter as an air conditioner.
He wondered how much blue-grade saltpeter Li Wenxi had now.
"Can only blue-grade be manufactured?" Xu Xin pondered for a moment, "Can't green-grade be made?"
Perhaps green-grade could be mass-produced.
