A dark and mystical portal door fit for the sea witch of The Little Mermaid, made of rugged ocean rock. The portal door has a rough, jagged stone texture, with tentacle-like carvings wrapping around its frame. resemble sea creature claws, adorned with eerie glowing gemstones. The portal door is surrounded by deep-sea elements like seaweed, coral, and eerie bioluminescent plants, creating an ominous underwater atmosphere.