Hobgoblin Bandit Lord not only gives your Goblins +1/+1 , it can straight up kill one of your opponents
Some of the best games of Pokmon Ive played (not just in Expanded, but in general) were Shadow Rider Calyrex VMAX vs Regidrago VSTAR in the Silver Tempest Expanded format
If a price was set at $500 and someone purchased it, then the price for Planeshift booster boxes could rise to the new sale price
However, like the tabletop version, Arena itself can have a steep learning curve if not approached carefully
There's a memory component here, but it's no harder to track than, say, the Day/Night cycle while there are no Daybound or Nightbound creatures in play
Upon returning after a short lived break from the game, I was surprised to discover that in the Lorwyn Alara Standard tribes like Kithkin and Faeries made a huge impact on the metagame