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Miracle Warriors: Seal of the Dark Lord, known as Haja no Fuuin (覇邪の封印) in Japan, is an RPG developed by Kogado and ASCII for the PC-88 and ported to the Sega Master System by Sega in 1987.
The Japanese release for the game came in a big box with a cloth map and a steel figure. It also made use of the Mark III's FM Sound Unit add-on for enhanced music (the Japanese Master System had the FM unit built-in).