The standard YuGiOh deck size is between 40 and 60 cards
A weaker variation, Potion, also exists
Rakdos Charm, however, is the perfect hidden answer (hidden, of course, because unlike Nihil Spellbomb, they dont see it coming) to Dredge and Living End, two matchups that generally require narrow, specific answers to really hope to beat
This is the first reprinting of Replication, as well as Ondu Spiritdancer, Athreos, Shroud-Veiled, One with the Multiverse, and some others
Otherwise, you'll have to try for boosters (you can get bulk packs at Amazon, or individually from the likes of Miniature Market)
There are a couple of hoops you need to jump through during the entry process, but again, all of that is in place to make sure Lorcana collectors and players are the ones who end up with the opportunity to buy these cards