137 Black Death Rune

Lin Yun left the alchemy laboratory two hours later and took a nap in his bedroom.

Working on a dozen core spell matrices of the Fanrusen Formula was too troublesome. Even with Lin Yun's abilities, he had nearly given up several times during the night, just wanting to go to sleep. But the Cloud Tower had kept transmitting the papers to him too quickly, and a new one would appear whenever he was finished with one, so Lin Yun clenched his teeth and persevered.

Naturally, this wasn't without reward. At least, Star Sage Jouyi promised that Hogg would come to Thousand Sails City with one of the Cloud Tower's True Spirit Magic Tools, the Black Death Rune.

Moreover, Lin Yun could use it for three months!