Yes, there are. Project Gutenberg is a great free option. It has thousands of classic novels that are in the public domain. You can easily download and read them on your device.
One option could be Wattpad. It has a vast collection of novels in various genres, from romance to mystery. Another is Goodreads. Although it's mainly a review and recommendation site, it can also lead you to places where you can read novels. Also, Project Gutenberg offers many classic novels for free.
I'm not entirely sure if it's a popular genre. Fanfiction can cover a vast range of themes, and while there may be some works with such themes, it might not be mainstream. The Black Clover fanfiction community has a lot of different types of stories, from adventure and friendship to power - up scenarios.
Black Clover tells the tale of Asta's journey to become the greatest mage. It's full of magic, friendships, and intense battles. Asta's perseverance and the complex web of relationships make it an engaging story.
Yes. The Black Clover light novel offers additional insights and background details that aren't present in the main series. It's a treat for fans who want to delve deeper into the world.