Constructing new skills had become quite familiar for Du You, the only difference this time was the particularly large number of Crystal Coins being used. A vast amount of yellow Crystal Coins burned, turning Du You's surroundings into what seemed like a sea of yellow flames.
The fluctuations emitted by the power of the world were highly attractive to many creatures nearby.
However, this place was different; it was the City of the Dead that Du You had just thoroughly destroyed. Moreover, with a significant number of dark beetles and an intense concentration of dark element around, it didn't attract any creatures.
Although the two sisters had been on alert, there was no danger. The burning of the Crystal Coins took a significant amount of time due to their large number, taking several hours before the construction of the new skill was finally complete.