The Sunken Isle

The Sunken Isle would be an underwater civilization surrounded by a large air dome. Inside the giant bubble, a village would rest, ruled by the sea king in a prismarine castle. The village would be deep enough that without the use of the water breathing potion it would not be accessible. The king could be challenged for his throne. If the king accepted, the two of them would teleport to a stadium in which they would fight. when the king is defeated, the player earns a crown and is given the title king of the isle. In this air pocket a single cave would lie at the edge of the village. In this cave a sea serpent would lurk. If defeated a chest would appear with a variety of treasures. Please consider this idea! And build on it if needed. I think this would be a cool addition to the oceans biome.