Just a random idea, but to be fair it would only be a matter of time until it got messed up.

Basically:
Core 10 modern or Core Modern...
Core 10 modern has (769) cards (search Modern and use the OR function on each of the sets limited alpha, limited beta, unlimited, revised, fourth, fifth, classic sixth, seventh, eighth, ninth, and tenth editions.)
Core modern would be any core set cards that are legal in modern.