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.
The Eternal Shrine was a dungeon in the Dream Battle Simulation Game. It could only be challenged once a day and was a single-player dungeon. The dominant faction in the dungeon was different every day. The main gameplay was to use the faction that countered the demon shadow. Before the challenge, it is recommended to observe whether there are buffs on the map. For example, there are healing points on the Valkyrie map, which can be used to receive the damage reduction buff. Before the challenge, it is recommended to read the boss's skills and map buffs, and bring four champions to deal damage. After clearing the game, one could obtain the item reward of Heart's Fetters, which could further strengthen the hero's attributes. The specific strategy could refer to the relevant game strategy articles and the experience shared by the players.
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.