Rarer cards have super low pull rates, sometimes 1% or less, so it can take an abundance of packs to ever see them
I will begin with the elephant in the room: This card has sparked a lot of debate in the Pauper community even having Gavin Verhey address it in the following tweet on May 24th: Cranial Ram is obviously powerful and is being compared to cards like Cranial Plating and All That Glitters
Speaking about this, he says: "Auction houses, hobby dealers and online marketplaces are generally the most frequent methods used by collectors to buy and sell Pokmon cards." On that note, you don't have to conduct the transaction over the internet and can always try local pawn shops, comic-book stores, or Craigslist
In-game, exile is usually your best bet
Legends was coming out, so I waited in line in front of my local game store and bought two boxes of boosters