So, she works with token making effects that put a creature out, including other turns
Joshua, Phoenix's Dominant A solid body which can help refresh your fuel, Joshuas face really lacks a standout feature, while the back costs a lot to get to, and really is missing haste to work in aggressive decks for the 5 mana that the transform costs
In particular, the other character featured on the card, Ugin, bears a start similarity to art by Magic: The Gathering artist Raymond Swanland
So, this card works well in a great variety of decks with different strategies because Guardian Project only checks if there are no creatures on the board like the one that just entered the board
There are many different types of tokens but they are just creatures that when they die just disappear