Miracle Warriors: Seal of the Dark Lord is a role-playing game (RPG) released for the Sega Master System in both the USA and Europe. Players embark on a quest, controlling a party of characters with various abilities and engaging in turn-based combat against numerous enemies. The game features a fantasy setting with a story centered around defeating a powerful dark lord.  While the exact development team for the Sega Master System version isn't always easily accessible through online resources, the game shares its title with other Miracle Warriors entries, which could help trace its origins. 

Miracle Warriors - Seal of the Dark Lord (USA, Europe)

Mick & Mack as the Global Gladiators (Europe)