"Create an epic underwater game scene where players explore a hidden city filled with ancient wonders and magical creatures, all set beneath a mesmerizing illuminated sky of swirling colors."

Craft a highly detailed and fantastical image of an epic underwater gaming environment. This scene should depict adventurous players, of varying descents and genders, exploring a concealed city brimming with age-old marvels. The architectural style of the city should reflect advanced ancient civilizations. The scene should be populated with magical creatures of various shape, sizes and colors, each possessing unique, enchanting characteristics. The sky overhead in this underwater world should be a captivating fusion of radiating colors, seemingly swirling and shifting, casting an otherworldly aura across the cityscape.