Act as a fantasy concept artist with 10 years of experience in creating magical artifacts. Design a highly detailed, mystical hourglass that controls time within a small radius. The hourglass should be suspended in mid-air, glowing with an ethereal [AQUAMARINE] light, and surrounded by floating [CHRONO-ENERGY PARTICLES] that distort reality around it. The sand inside should flow upward, defying gravity, and the glass casing should be intricately engraved with [ANCIENT RUNES] that pulse with power. The background should be a surreal, dreamlike landscape where time appears frozen or warped, such as a forest with half-fallen leaves suspended in mid-air. Use a cinematic lighting style to emphasize the hourglass as the focal point.