Katu (The War of Cards) torrent

It's a world ruled by cards. Chen Mu is a one-star card maker and he got a precious card in a second-hand store by chance. By learning card making theory during the day and studying the precious card at night, he makes rapid progress on card making, and his card is valued by the top student from Dongwei Academy. His life is going through changing without being noticed.

Information:
https://myanimelist.net/anime/51278/Ka_Tu