Magic and the Weave are intertwined in ways that the races of man will never fully understand. One exists because of the other and it is rumored that one would not exist without the other. The Weave holds back the Wyld energies of which magic is composed of. Wyld energies form all magic as it is teased through small rifts that the magic user opens with their various means.
Without the Wyld, there would not only be no magic, but nothing at all as all of existence is created from Wyld energies that have been given form by the Wyrd. Without the Weave, the energies of the Wyld would overwhelm creation with so much formlessness that reality would implode upon itself. So, one exists because of the other as it is seem by most who even have a semblance of perceived understanding of such things.
What is not known by most is why magic was gone for so long and only in the past few hundred years has it come again. Is it connected to the Faewyld and Umbral Lands suddenly having strong gateways between the domains? Does it have something to do with the removal of the Draconic Guardians? It most assuredly must. The planet was violently ripped in half. All life was nearly extinguished and now there is more wonder in the world that has come from such disaster. Only time will tell what is to come next.