This is an Order 9 Magic Square, but it only uses the digits 6, 8, and 9. This is kind of a a take off of Holey Primes  prime numbers that only contain digits with holes in them (0, 4, 6, 8, and 8). I chose 6, 8, and 9 because with 3 different digits there are 81 ways to write a 4 digit number, and a Order 9 (9 x 9) Magic Square has 81 blocks to fill. I have not checked to see if it has any other properties other than the basics needed to classify it as a Magic Square.
8899

6898

9896

8689

6688

9686

8969

6968

9966

8669

6668

9666

8999

6998

9996

8889

6888

9886

8989

6988

9986

8869

6868

9866

8699

6698

9696

6896

9899

8898

6686

9689

8688

6966

9969

8968

6666

9669

8668

6996

9999

8998

6886

9889

8888

6986

9989

8988

6866

9869

8868

6696

9699

8698

9898

8896

6899

9688

8686

6689

9968

8966

6969

9668

8666

6669

9998

8996

6999

9888

8886

6889

9988

8986

6989

9868

8866

6869

9698

8696

6699

David
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