C727 Matt. in May's Previous Life.

"The altar's stone slab."

Lin Yuan grinned as he explained the origins of the stone slab. In the end, he shook his head helplessly.

"If we can forge this thing into a weapon, not to mention anything else, just its hardness alone is enough to make it indestructible."

"However, Teacher, if we can't soften it, then it's useless. It's not suitable to swing a brick on the battlefield