The Development System of the Big Devil

The protagonist's followers are getting stronger and stronger The scale of the sacrifices became larger and larger every time. The glory of God never appeared Devout believers cry under the cross Then completely despair In the end, this plane was sacrificed to hell by the protagonist Rong The protagonist's believer turns into a devil and continues to crawl at the protagonist's feet

Author, do you still want to fall in love and kill each other? Arturia was betrayed by the protagonist she trusted the most, and then Merlin escaped at the cost of her life! Then after the protagonist enters the Holy Grail, they meet each other and kill each other. Or the protagonist takes the corrupted King Arthur to meet and kill the original King Arthur in the Holy Grail Or King Arthur slowly falls in love with the protagonist, and then chooses to fall in order to stay with the protagonist forever! Or the protagonist turns on the training mode and teaches a darkened version of King Arthur, and then ends up falling for love...

When playing with female characters, the protagonist should not put his emotions into it.

One is the famous Knight King, and the other is an unknown magician. Either harvest their souls or turn them into your subordinates King Arthur chose to surrender after losing everything and became the protagonist's Ghost Rider. And Merlin is involved in the protagonist's plots one after another...

Cultists who worship the devil Sacrifice their gods with the blood and souls of innocents Finally opened up the evil side of the devil It's really hard I hope the protagonist doesn't think it's too cruel and then bans sacrifices. The devil should be cruel and ruthless without any limit I hope that the protagonist's followers will shout loudly when fighting the enemy: Blood sacrifice to my Lord, head to the true God! This slogan sounds so passionate

I am the man who wants to become the Great Demon King 2333 So who is the Great Demon King?

In the end, there was a problem with the protagonist's finishing (after all, it was the first time and he was inexperienced), and then Merlin gave away Artoria's soul with his life (Artoria's soul safely returned to the Hall of Valor and became a heroic spirit). Then the protagonist's biggest gain flew away (the souls of Merlin and King Arthur), but luckily it was not a big loss. All the twelve knights of the Round Table were seduced, corrupted and taken away by the protagonist, as well as the group of Saxon fanatic believers... Then after a long time, the protagonist entered a new copy - the Holy Grail War, and was summoned by Ryunosuke Uyu, a pure murderer believer (I personally think Ryunosuke Uyu is very pure, pure dark heart and dark soul, the protagonist will never let him go), and then after a battle, he successfully recovered Artoria's soul, and by the way, he pulled the Holy Grail plane into hell for assimilation...

I think you, the author, can also play some other tricks. Who says that the devil must kill people and set fire to commit all kinds of evil? While keeping the devil's mind difficult to fathom and change at will, you can let him come to the positive side. And I think the author can pay attention to the inner changes of the protagonist. After all, according to your previous setting, the protagonist is just an otaku. I don't think that an otaku can suddenly become a legitimate devil just after traveling through time and becoming a devil.