Sukuna does die in the manga. The way it happens is quite dramatic and ties in with many other elements of the story, adding depth and tension to the overall narrative.
No. Ryomen Sukuna is a fictional character from Japanese mythology and modern manga/anime. He doesn't have a basis in a true historical event or person.
Nope. Ryomen Sukuna has no basis in reality. It's a product of the creative minds of the writers and illustrators who designed a captivating fictional character for the enjoyment of the audience.
The Heaven-Devouring Furnace and the Furnace of Good Fortune were concepts and props that appeared in novels. The specific information about the Devouring Heaven Furnace and the Furnace of Good Fortune was not clear. One of the novels was called 'Devouring Heaven's Fortune Scripture'. It told the story of the protagonist, Luo Yi, fighting for the country. He cultivated the Devouring Heaven's Fortune Scripture through the inheritance of the Heaven Devouring Divine Emperor. He could devour blood and become a god through nine transformations. There were also some search results that mentioned the Furnace of Good Fortune, but did not provide a specific explanation or storyline. Therefore, regarding the details of the Heaven Devouring Furnace and the Furnace of Good Fortune, I am unable to provide an accurate answer.
The scene of Sukuna's death in the manga is a climactic moment. It's filled with action and drama, as various powers and tactics are employed to bring him down. The build-up to this point is full of tension.
In the manga, Sukuna doesn't possess all 20 fingers. There are specific story arcs and events where his finger count changes based on the plot developments.