This was more than two years after the release of the first card to create a zombie token: Feast or Famine, a "choose one" spell, whose token-creating half is the significantly less powerful mode of the two
The only legal places to play Gitaxian Probe are Commander, Oathbreaker, and Vintage (at one copy)
The most straightforward theme is a single Pokmon type, like a Fire-type or a Water-type deck
You dont need anything else to play with friends or family, but each player needs their own deck
These take a long time to print, especially in mass quantities, which is the reason for them being extremely limited
It just so happens that Blue, Red and White have a lot of good planeswalkers