A realistic portrayal of a supervillain inspired by the Capricorn zodiac sign, named Mountain Master. This character has rock-like skin and the power to cause seismic tremors. The supervillain's appearance should be disciplined and relentless, with a costume that incorporates elements of rocks and mountainous terrain. The design suggests strength and resilience, embodying the characteristics of Capricorn. The character is shown in a full-body pose, perhaps with the ground cracking or rocks levitating around them, indicating their seismic powers. The background can be a rugged mountain landscape, complementing their earthy nature. The character can be either male or female, with a posture that is both imposing and unyielding, capturing the essence of Capricorn.