I traveled through hundreds of worlds at once

"Master! Master!"

Four days passed in a blink of an eye. Yi Hui, with two dark circles under his eyes, was holding a metal card with special patterns, constantly modifying the data with an instrument. There were a lot of canned coffee on the ground around him. It was obvious that he had been staying up late to modify the magic formula.

This metal card was the magic guide device that was upgraded and modified by the magic cannon Yi Hui. The name has not been chosen yet.

At this time, Lily in the room suddenly opened the door and rushed out, shouting to Yi Hui happily.

"What!" Yi Hui's hand trembled suddenly, and a row of data was scrapped.