Fairy Tail: You Can Become Stronger By Spending Krypton Gold

Cheng Feng traveled through time and entered the world of Fairy Tail.
In this world where the per capita combat power is off the charts, Cheng Feng is a little panicked.
Fortunately, he has the ability to receive magic, and he also has a card drawing system.
If you have money, you can draw cards, and the drawn cards can be used by receiving magic.
Now it gets interesting.
You can become stronger with krypton gold. As long as the money is in place, the Black Dragon will be useless!