Dromii is the first island ever to be made by Mata Nui. It was made on his first planet, First BIONICLE Planet, to hold the First Matoran he had created. Mata Nui made Dromii a beautoful paradise. However, few days after the Matoran got to the island, it slowly started to sink to the Ocean of Prosperity. This was because it had been Mata Nuis first island, and he wasn't very skilled in creating in those times. He had done something wrong and the island sank. The Matoran noticed this and started moving further away from the coast but the island would sink completely, and there was no safe place for the Matoran.