If you play limited or Standard, it'll be hard to really see the appeal of Quantum Riddler
The Pokemon Scarlet & Violet 151 Booster Pack has a low probability of having a complete evolution line of Bulbasaur, Charmander, or Squirtle , which are considered Secret Cards (in place of the two Reverse Holo cards and the Rare card)
The real prize, however, is in how easy it is to summon Fenrir it can be added into virtually every deck and offers consistent, deadly interruption
For financial analysis, Im ignoring the 13 new-to-Magic cards per deck
Stay informed about the metagame and pay attention to the results of tournaments to understand which decks are being used the most and how they are being constructed
Getting them can be easy, but sometimes its not enough, as you may run out of them