Way to trade mythics

I think it would be a great idea to have a way to trade mythics. Something in the vault perhaps. Pay an amount of recources, sacrifice a mythic and get another random mythic. You know, a way to get rid of all those extra mythics you have no use for. Or maybe even something along the lines of sacrifice 5 mythics get 1 unowned mythic troop. (and when I say mythic, I mean actual start as mythic rank 6.