MTL - Cult of the Sacred Runes - Chapter 666 40% power

Adelaine Hammond transmigrated inside her own unfinished novel. New identity, new world, new everything. She became Remillia Lockhart, a character she didn't know of. In simple terms, an extra. She became an extra in her own novel.She became a Hero, fighting monsters, making enemies, and also why is she having love interests?? However the novel she once wrote of is becoming different and more strange. The Monsters are more stronger, new enemies, series of events that she did not even write, and how come she's getting stronger than the original MC's?She must find a way to survive and get out of this damned novel.

Since I’m good-looking, I might as well become an actor.

I am the sword.
Killing a man amidst a thousand miles, no one dares take ten steps.
Killing a man amidst a thousand miles, no one can take ten steps.
Killing a man amidst a thousand miles, ten steps? Not possible!
I am the sword, the sword is me,
On the path towards heaven, each shall wield their own.

After 2000 years has passed, the ruthless demon lord has just been reincarnated! But his aptitude at an academy for nurturing candidates for demon lords is, “Inept”!?

Having the capability to destroy humans, elementals, and gods, after a long period of countless wars and strife, Arnos the demon lord became sick and tired of all that and longed for a peaceful world, so he decided to reincarnate to the future.

However, what awaited him after his reincarnation is a world too used to peace that his descendants became too weak due to a huge weakening in magical powers.

Arnos enrolled in the Maou Academy established to find any students that might be the demon lord’s reincarnation, but his powers are too extraordinary that those in the academy couldn’t properly judge his powers, so he’s regarded as an “Inept student”. Being underestimated and avoided by most people there, he recruited a girl friendly to him, Misha, as his subordinate and comrade, and strives to climb to the top of the demon race hierarchy to one day reclaim his former title and status.