Lin Ziqi, a boy who likes Yu-Gi-Oh, travels back to Fairy Tail after being hit and becomes Lucy's twin brother, Lucky Heartfilia.
The newly formed deck, Ice Barrier, was hidden in his body for special reasons.
Because of his huge magical power, he was sent to a research institute like Urutia when he was a child. He was full of loneliness, but he was able to maintain an optimistic attitude.
Due to the uncontrollable magic power, the research institute exploded. He finally escaped from the research institute that brought him dark memories. He was later picked up by his mentor, who used all his strength and magic seal beads to hide the huge magic power in his body.
(This is my first time trying Fairy Tail. Please don't mind if the writing is not good. I'm not sure about the update yet, but I will try my best to update it because I still have part-time work to do. I can't afford to hurt the hard-working author. I hope you don't criticize me. If you mind, please tell me and I will try my best to change it.)