Gaia

A small planetoid orbeting close to The Sun. Astronomers believe that Gaia and Theia collided during the early years of the solar system. Part of Gaia remained near Theia and consolidated into Theros while a larger chunk was hurled toward Ilios. The immense heat caused by this collision turned the remains of Gaia into a ball of magma which, due to its close proximity to the sun, has never cooled down.