When it comes to doing a quick and dirty expected-value calculation of your own, the formula is the same for rares as for mythics: add up the value of all of the rares in the set, divide by the total number of rares in the set (almost always 53), and then multiply by the number of rares you should open in a box (31.5, with the other 4.5 rare slots being filled by mythics)
Since Rulik Mons adds green to your Goblin deck, you can start playing cards like Doubling Season and Parallel Lives to start doubling up on your token generation
Japanese cards grade higher on average at PSA due to better centering and edge quality
Kolaghan's Command It is hard not to get a two for one with this card
I highly recommend getting stuff on Pokevault if you're looking for something only in Japan, and will definitely be getting more stuff in the future
Yugioh Duel Links is the fast easy-to-understand TCG version suited more for casual fans and beginners, while Yugioh Master Duel is more complex and is for competitive players
