[Villain Protagonist + Transmigrate into a Book + Female Lead + Male-Oriented Novel + Warcraft-Inspired]
You can think of it as a gender-swapped Kael'thas story.
She wakes up to find she's transmigrated into a novel and become its second-biggest villain, Kaelira. As a blood mage, her magic is one-use only. Without magic of her own, she can only absorb it from other creatures.
In the original story, Kaelira wanted to free her people from their addiction to magic. She believed the demons' lies and was ultimately run through by the righteous protagonist, Leon.
Now that she's transmigrated into the book, she'll change the villain's fate and fulfill her dream of building a nation for blood mages and helping her people break free of their addiction to magic.
