Their main strategy is to use Numeron Calling's effect to summon 4 Numeron Gate monsters ( Gate of Numeron in the OCG) and OTK with their exponentially increasing ATKs
Compare the back to a card you know is real to notice any differences
These are the ones worth hunting down specifically: the versions that best capture the character, whether thats the most iconic art, the rarest variant, or just the one that looks best in a binder or slab
It requires specific kinds of board state: your opponent must have a board youre able to bounce, you need a creature big enough to bounce all of their important creatures, and you need to have sufficient resources to take advantage of trading card advantage for tempo (which runs counter to how almost every other Exploit card works)
Over a long game, and especially across multiple fetches, this idea remains true
Steer clear of any set-based Jumpstart products like those affiliated with The Brothers War or Dominaria United, as their power level and card selection is MUCH poorer