Emerald can also be aggro itself, especially with the popular Legendary card, Beast: Relentless, which readies every time an enemy character is damaged
That's the best price this box has been with the retailer so far (confirmed via camelcamelcamel )
Being able to see more cards than just the top deck each turn can help you find the pieces you need to pull off a winning combo or just get that final attacker into play that gives you just enough damage to win the game
The more nonartifact mana you have, the more permanents you get to keep, and if you have Ravager in play, you can sacrifice artifacts that you cant pay for and get a little extra value out of them
Which cards should we be looking at more closely
There are a lot of good reasons to want to play Green-based Devotion with Nykthos and Nissa in Pioneer, for sure