Four heavenly kings some time ago:
Trident, light gun, disaster, books
Further on, the four kings of bug level:
Trident, light machine gun, bomber (single card 4000), Royal (atk2800, with ntr effect)
"Game King Mugen" is a domestic fan work, which inherits the world view of the animation "Game King-Monster Duel". The stage is a marine world composed of two continents, East and West. Under the background of war, there are many cultural elements besides the main theme of duel.