Spelljammer Helm

A Spelljammer helm, also known as a spelljamming helm or simply a helm, is a device that converts energy - be it magical, psionic, or the very life force of a living creature - into motive force which propels a ship (known as a spelljammer) at great speed through the void of the Astral Sea . Specifics vary from race to race, but in general, a helm resembles a large ornate chair[1] upon which a mage or priest (known as the helmsman) will sit and act as a living engine, providing the magical power to propel the ship through the sea, as well as perform some basic maneuvering as well. Various helms convert alternative sources of energy into motive force, but, in general, the more powerful the magic, the faster and further a ship can move .