Very interesting . It would take some effort to get it all going but it would work eventually . Would there be one public key to read messages and one private one to write them ? <| sep |> I think it comes down to a couple of factors . People pick their commanders for one of two things . Power or Synergy Currently no pairing really lends anything new in terms of power level . And with any choice , there are better options in that collective colour identity . Furthermore , there is no inherent synergies between partners that don ' t have the same colour identity . So effectively , they are still a 2 colour deck . Which means that any attempt at 3 , or even 4 colour combinations do not mesh really well . And in the case of 3 colour , sometimes you are still better off picking one of the existing commanders . Two bad cards can sometimes equal a single good card . But partners is not that case . It would be akin to me resolving Necropotence , and you get to resolve Divination and Rampant Growth . Yes . You did a more efficient play . But your two cards collective power level is so inconsequential when compared to my one , that I literally don ' t care that you resolved them . I am probably 90 % to win that game on that comparison alone . And that is how partners feel . Sure you got to do a thing . But it is not the thing that anyone will care about .