Create an image of a majestic unicorn sitting for a portrait in a mystical forest, with the unicorn adorned in intricate armor inspired by Greek mythology, surrounded by a variety of mythical creatures such as dragons, griffins, and phoenixes.

A majestic unicorn wearing intricate armor inspired by Greek mythology poses for a portrait within an enchanting forest. The unicorn's glorious armor sparkles under the forest's dappled sunlight. Surrounding the unicorn are a host of mythical creatures each demonstrating their unique beauty and charm. A dragon perched on a high rock, griffins soaring through the luscious canopy above, and phoenixes that move gracefully amidst flickering embers. They all coexist harmoniously, embodying the magic of this fantastical world.