C356 A Business Genius!

Two days later, Feng Yixiu had successfully upgraded all the gray iron level Dark Companion cards to the bronze level.

"Fusing these Dark Companion cards is even more exhausting than training!" Feng Yixiu mopped his brow, gazing at the over five hundred bronze level Dark Companion cards with a sense of pride.

"Still, fusing the Dark Companion cards has its perks for training