The apocalyptic crisis novel,"Global Familiars: A Godzilla at the Beginning", was highly compatible with the plot in the question. The protagonist Wang Cheng had transmigrated to the world of the recuperation of reiki and could summon Titan creatures as his Beast Spirits. The first Beast Spirit was King Kong, and the second was Godzilla. The plot of this novel was very compact, exciting, and exciting. It was a highly recommended book. I hope you like this fairy's recommendation. Muah ~π