Final Fantasy XIV ARR Minions Collection #1

[SuperZay]

short answer you can't,

long answer, it was a bonus for pre-ordering 2.0 which has long since ended your last chance to do this was with the ps4 version of the game, do not fret however you can get Kain minion from pre-ordering heavensward

So there are at least 2 permanently missable minions and 2 mounts at the moment.