Things to watch out for:
1. The protagonist is completely opposed to the main cast.
2. The System is basically invincible.
3. The protagonist who gets inserted into the story is a real jerk.
4. Many members of the main cast will die by the end.
5. Draco will also become a Death Apostle.
6. The characters are seriously out of character.
7. The main plot deviates heavily from the original.
Dolosa Abbott was a wealthy young heir before transmigrating. Spoiled and headstrong, he was a little childish. A devoted Harry Potter fan, he especially loved Draco, not simply because he was handsome, but because of his personality.
He transmigrates into the body of a boy whose mother was a Veela and whose father was an extreme Pure-blood supremacist. Because his mother was a Veela, his father killed her, and the boy was abused because of his bloodline.
He transmigrates with a System.
His goals: treat Hannah Abbott well, win Malfoy over, defeat The Chosen One, overthrow Voldemort, and become the third Dark Lord.
Of course, he'll help Voldemort merge with his Horcruxes and become handsome and intelligent.
This is my first time writing a novel, so that's that. Read it if you like it. If you don't, there's not much I can do.