Getting to immediately discard two and draw two gives you huge value, sculpting your hand, setting up delirium and the like
It's also useful in the most competitive Commander decks that want to win within the first three turns
Popular Pokemon also tend to be worth more than others this is why Charizard, or in Prisatic Evolutions case the Eeveelutions, especially Umbreon are always worth more than, saqy, a Bruxish
Perhaps my favorite touch here is Wonder Pick, a feature that lets players pick a random card from someone elses pull
Palladia-Mors brings a serious game-changing level of heat for very little
The other great thing about Snap is that its part of a three-card infinite mana combo with Eternal Witness (or similar) and Gaeas Cradle (or another way to get 6 mana out of two lands)