Antiquitas lost

A boy named Elliott, a lonesome kid with deformities on his hands and feet, who is uprooted from his home after his mother falls gravely ill. When they move to New Orleans so his grandfather can help care for her, Elliott learns that the old man's eighteenth century mansion hides an ancient secret. While checking out some strange relics in the basement, Elliott strays through an ancient doorway into a tumultuous parallel world, full of bizarre creatures and warring races. He has stumbled into Pangrelor, the most ancient of all worlds and "mother to all the stars in the sky." As he learns to navigate his new surroundings, he discovers wondrous abilities he never dreamed he possessed, and an abiding connection to the primitive, alien world that will forever change him.