It might be borderline impossible to collect a single copy of every Magic: The Gathering card ever printed, much less a playset of every card, but if you've ever wanted to build out a set, like a collection of a specific set, it could be something like a challenge to collectors
Green is a great color identity, so players don't have to be too picky when deciding on a background for him, and the deck's included background, Passionate Archaeologist, is probably the best choice
Since you're in Jund colors, you have access to a few more spells and creatures that let you increase the power of your creatures when you attack, letting you put your opponents on the ropes
During your End Phase: Roll a 6-sided die
Ojama Black
Unfortunately, theres no one answer to whether Japanese Pokmon cards are more valuable than English cards