Each deck’s token creature is selected during the deck-generation process like this: First, the deck’s three houses are randomly chosen, then one token creature is randomly chosen from among all the available token creatures within the deck’s three houses.
Each Winds of Exchange deck that features Mars could include one of the above three cards as its token creature, but it could just as easily instead have a token creature from one of the deck’s other two houses.
Token creatures add a lot of interesting potential to a deck. First of all, they are creatures, which means most of them can do the very useful fighting and reaping necessary to secure your victory. Many token creatures also include common traits, such as “scientist,” that interact with many other card effects. Token creatures also create the possibility to have many cards in play at the same time that all share the same name; who knows what sort of shenanigans could result?!
Most card effects that refer to token creatures work no matter which token creature is included in the deck. But, there are a few exceptions. Let’s look at Blorbs!