Mystic Monster Era (MERA) is an innovative open-world game designed to redefine the gaming experience through the integration of non-fungible tokens (NFTs), enabling players to complete missions, capture, train, evolve, and battle monsters for financial rewards. Mystic Monster Era leverages blockchain technology to securely store all in-game assets, achievements, and progress, providing players with true ownership and the ability to monetize their gameplay. This whitepaper outlines the core concepts, mechanics, and potential of MERA, showcasing its potential to disrupt the gaming industry.