The hollow depths an awakening

The marked ones have always been peace keepers of the inferno realms and the eternal realms and are constantly keeping the fragile balance of the worlds in check.
Horrors and magic fill their world, and creatures whispering of myths indirectly help humanity. But not all as it seems, as a rouge from the inferno realms steals one of the three jewels of power and awakens the summering crystal being.
Maryanne, a marked one, must join forces with the young guardian and retrieve the Jewel, but hints of betrayal and sacrifice are near far from both sides, as the myths are real and their secrets unravel, changing everything they know, with the thief closing in on the other two jewels and tensions can the protagonists prevent their realms collapsing in on themselves