I found this after a couple of google searches:

However, it seems the diagonals across the different squares are not magic. For example, the 8-1-6 diagonal doesn't add to 42. On the contrary, all of the diagonals from opposite corners like 19-14-9 and any cross-section that does not involve a diagonal i.e. if it were a 3d cube they would be orthogonally adjacent does work. My question is if one exists where ALL diagonals, cross-sections, and vertical or horizontal sums yield the same value. I've been wondering about this for along time. Thanks