With the Base Set we can never overthink things enough
Triumph of the Hordes isnt the biggest pump on this list, but it turns your creatures' damage into -1/-1 counters and poison counters
For more veteran players, or for players who are hosting a night of Magic games, the booster boxes offer a chance to pick up packs of sets that you can open en masse to increase your odds of getting some of the rarer sets or just throw your own booster draft tournaments
This is basically like if CW Liokaiser or TR Chaos on Velocitron was sold at a Botcon a few months before coming to where they were normally sold
For example, if players can get "Moana, Kakamora Leader" into play, one of Azurite Sea's new cards, she can move any amount of characters in-play to the same location for free, and then gain +1 lore for each character
With every tournament being a bloodbath, I think now its more important than ever to get a good feel for the reasons we choose decks