Creating a new world was not synonymous with creating a new plane. Not even a highly skilled mage, or even Sovereigns, could create a new plane.
What Kyran intended to do was create a 'world' within the void of an existing plane.
One good example of such a world was the Spirits world; it was situated within the Human plane but did not overlap. Such an occurrence could be likened to two realms coexisting in the same plane, but was different from a parallel world.
Nevertheless the Spirits world could not absorb the magic energy in the Human plane and needed its own magic energy source to sustain life within. Because of this, the Spirit world had an artificial magic energy source called the 'heart' to supply it with magic energy. After all, a world could only flourish if there was enough magic energy circulating within.
