Armageddon

Everything takes place in an alternate world where monsters, magics, and fantasy comes alike but the twist to this setting is a mystical powerful being called the Armageddon that appeared 100 years ago. The Armageddon sends famous historical figures that made a significant impact to the world or achievements they've earned through that alternate world whether they were good or bad. Kind of like an Isekai as they can interact with the beings existing in that world and even be allies with kingdoms or clans, and grow stronger through training and using magic. The historical figures act as competitors fighting to gain the ultimate reward of the Armageddon that will remain a secret and will be revealed later on in the story. But it is said that the Armageddon will grant the said wish of that winner's ultimate desire.