第1章 这是魔术

It's magic

[Slytherin][Hermione is the only female protagonist][More rigorous: After living in another world for ten years, the protagonist barely remembers a little about Harry Potter][Not a system]
The false devil:
Gather the Saints to fight against the Muggles.
Occupy Britain and attack the school.
The real devil:
Destroy the world and cause great suffering to all living beings.
Elias traveled through time for eleven years and suddenly found out that he had traveled to the world of Harry Potter and was chosen by the bloodline of the devil!
You only need to gather three of the seven deadly sins: pride, wrath, laziness, greed, envy, gluttony, and ecstasy, and the power of the devil in your blood will automatically summon the devil to possess you and destroy the world!
For the peace of the world,
From that day on, Elias knew that his idle life would be gone forever...

【斯莱特林】【单女主赫敏】【严谨点：异世界生活十年，主角勉强记得哈利波特一点东西】【不是系统】
虚假的魔王：
集结圣徒，对抗麻瓜。
占领英国，攻打学校。
真正的魔王：
毁灭世界，生灵涂炭。
伊莱亚斯穿越十一年，突然发现原来是穿越到了哈利波特的世界，还被魔王血脉给选中了！
只需要集齐七原罪：傲慢、暴怒、懒惰、贪婪、嫉妒、暴食、极乐中的三种罪恶，血脉中的魔王之力就会自动召唤魔王附体，毁灭世界！
为了世界的安宁，
从那天起，伊莱亚斯便知道，自己的咸鱼生活要一去不复返了……