Rhotuka were wheels of energy with various powers. All creatures have the ability to make Rhotuka, but they would be useless unless one also had a launcher to fire them with. Many Rahi and creatures of the Matoran Universe have developed natural launchers, but artificial ones were used by creatures such as Toa and some Dark Hunters. The layer of energy that bonds Rhotuka together make the spinners tangible, thus they can be ridden if one should choose to do so. Each creature with a Rhotuka launcher creates their own unique spinner power. The powers of these Rhotuka are derived from that character's morals, ethics and affinities. For example, only a Toa of Fire could use a fire spinner, and Sidorak, who valued obedience in his troops and had a desire for domination, fired Obedience spinners