The shattered astravane. Book one the keeper

Long ago before light and darkness collided, a weapon known as the Astravane was born into the world. Only a heart pure connection to the cosmos and a heart balance of light and darkness, could you only have the Astravane. Going beyond that the four masters were born. The keeper, a powerful enigma giving them their astravane, all of them coming in different sizes and shapes. But for one soul purpose to protect the universe and to stop The Celestium Guild. The astravane is a weapon of duality of light and darkness. Only chosen ones can wield. Our main protagonists Zay and his rag tag family, are sent upon dangerous missions and discover their ancestors race from millions of years ago. As a looming threat hovers over there shoulder and countless foes and allies pop up along the journey. Will Zay save the cosmos and the dimensions?