Complex sentence: Diving is a unique part to the Ar Tonelico RPG system, by accessing Dive Shops, player can enter the mind of Aurica and Misha and later Shurelia which is called the Cosmosphere.
Split into simpler sentences: Diving is a unique part to the Ar tonelico RPG system. By accessing Dive Shops, the player can enter the mind of Aurica and Misha (and later Shurelia) which is called the Cosmosphere.