Create a poster featuring a heroic character named "Ariadne of Atlantis." 

1. **Character Design**: Portray Ariadne as a strong, fierce figure, holding a trident instead of a spear. She has long, wavy hair and wears an ornate tunic with a modern twist, featuring vibrant blue and turquoise colors.

2. **Background**: Set the scene in an underwater city with ancient ruins, coral reefs, and bubbles. Incorporate whimsical sea creatures in the background.

3. **Typography**: Use bold, stylized lettering for the title "ARIADNE of ATLANTIS." Place a tagline above that reads, "An Epic Journey Beneath the Waves."

4. **Additional Elements**: Instead of brand references, include mystical symbols or runes scattered throughout the background, and a small map of Atlantis in the corner, hinting at the journey.

5. **Color Palette**: Incorporate deep blues, greens, and hints of gold to create an underwater vibe.

6. **Credits**: At the bottom, replace names with fictitious production companies and creators, maintaining a cinematic format.