majestic fantasy castle high atop mountain cliffs under moonlight, multiple towers

fantasy castle mountain cliffs moonlight towers glowing windows waterfall staircases landscape stars clouds magical atmosphere whimsical kingdom green blue tones enchanted medieval fortress architecture stronghold royal palace fairytale epic adventure dreamy mysterious art digital graphic backdrop concept design illustration vector game storybook otherworldly imaginary scenery nature sky evening twilight celestial majestic high atop under multiple featuring large moon drifting no people night scene