Ever since she lost her sight and the Black-Eyes Black Dragon, Renka has never smiled again.
After transmigrating, she began to believe in the mysterious. After losing her great black dragon, she became a shrine maiden and set out to seek the gods.
And so, a god answered Renka:
"Use duels to find the smile you've lost."
Only then did Renka remember that her surname was actually Kaiba, and that she had an obnoxiously smug older brother who was an absolute materialist.
But...
Why are these duels played with Hearthstone instead of Yu-Gi-Oh!?
Get lost, C'Thun! Stop muttering the solution to a system of linear equations in two variables in my ear!!!