The Clockwork Beasts #1 The Xarthane Crystal

Its 20600 AS (Age of Steam) Four cities remain of 25 that have malfunctioned and fell to the world below, these four cities which are powered by steam and electricty are the remainder of a brillaint intelegent race of human beings, with the help of the Xarthane Crystal , the life source of the floating cities which keeps them afloat, however the Xarthane crystal is slowly dying, and they have a short amonut of time before thier luxuerious life is sent plummiting down to the world of hell below. The Immortal Engineers, highly advanced supernatural beings that reside in the city of Velocity most choose four heroes from the four cities go go fourth into the world below in search of a new Xarthane Crystal, and joining them are the Clockwork Beasts, huge feral beasts made of nothing but pure metal that are withheld in beautifully made watches and are given only to those who need them to survive, they are sent into the world below to face an unholy horror to save their Kingdom before it plummits into the shadows, can these heroes find the missing shards of the new Xarthane Crystal, or will they see their cities meet a horrible  fate?