Return to volcano's heart

Jiushu opened the blueprint immediately and checked. 

It's fairly easy to make, only it asked for far too many rare materials that did not exist. 

Automatic ink brush: An automatic ink brush does not need to be dipped in ink when it writes. 

While the making of ink brush is simple, the quality of wood used, the quality of ink hair and the ink determine the final quality of the ink brush. 

For drawing formations, it is best to use Nanmu wood, green phoenix tail hair, forge them with a golden grip. 

For writing records, it is best to use ebony wood, elephant tail hair, forge them with a brass grip. 

For writing contracts, … 

For storing fire,  … 

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For matters of the underworld, it is best to use spiritual wood, with spider thread, forge them with ivory. 

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