[PC][2010?] Old childhood game about saving your cursed sister
First of all, English is not my first language, so forgive me for any mistakes.
I used to go to a friend's house and play games with him on his PC, around the year 2010. I had this game with somewhat old-fashioned graphics, i'm almost certain the graphic was 2D. I don't remember much about it, but I remember that we were a boy who had to save his sister (?) who was cursed by an evil sorcerer. We started in a city in a very RPG-style setting. I also remember that there was a mechanic of gaining a new power with each boss defeated; I especially remember one boss that was a plant. Unfortunately, that's all I remember. Because it's been many years and I was quite young at the time, some of my memories may be confused and jumbled. I hope you can help me, thank you very much, I've been looking for this game for a year.