The higher the combined stats, the wider the range of creatures you can tutor directly into play, which leads to more mana to cast even bigger creatures
After thinking on it, though, I think Servant is only contextually powerful, and so it slipped out of the top 10
Thoughtcast, the only card with the actual affinity mechanic that still sees regular play, is kind of like the glue that holds the deck together
And, exclusively in Collector Boosters, less 1% of the Jurassic World cards could have an emblem, making them extremely valuable
Revel in Riches Revel in Riches is a win condition thats easier to achieve each year thanks to WotC ramping up the Treasure production
At the same time, however, most make more energy than they'll want to use immediately, and only give you a single chance to spend said energy