We can tutor our combo piece with transmute like Dizzy Spell for Curiosity, we have lots of treasure looters like Big Score to ramp out Niv and also dig for our combos, we've got plenty of board wipes like Reckless Endeavor, and if our opponents' life totals are higher than our library count we can reshuffle with Commit // Memory to burn more
Emerald and Rubys split ability to deal with opponents cards while working toward unleashing its own powerful characters makes it a deck that requires some practice to fully understand, needing some careful cardplay - and good luck - to overcome its less forgiving aspects
Cosmetic flairs are little sparkles, hearts, or type-adjacent animations that can be applied to cards in binders to show off
Set completionists exist, and they'd rather buy a complete common/uncommon set for $25 than hunt down 100+ individual cards
So looks like I won't bother getting it
Nothing has changed from what your opponent has access to in their hand or on the battlefield