Wise Man’s Grandchild

A young man is reborn in another world and adopted as an infant by the celebrated hero Merlin Wolford, who gives him the name Shin. Under Merlin's training, Shin grows into an exceptionally powerful teenager and has accumulated an extraordinary range of abilities by the time he turns fifteen. His upbringing has one significant gap, however: despite all that magical education, his adoptive grandfather never taught him much common sense.