General here,
There isn’t often stuff that shows up in standard that is of massive use in EDH, except for most of the gearhulks from the last set. There are however a few niche items in each color that are of interest in this set, for specific decks.
First color in the wheel is white, so we will start there. We are going to skip over the most obvious choice on the planet, Exquisite Archangel, because it is the easiest work around to a ton of loss conditions, and can let you straight out ignore a massive lethal swing, at least for one turn.
The two cards in this set that are of particular interest are Call for Unity and Solemn Recruit, and they work together. Both utilize the new mechanic revolt, which works off of permanents you control leaving the battlefield. In EDH this is incredibly easy to pull off with everything from fetch lands to bounce type effects, to the deck these two cards are perfect for Obzedat, Ghost Council. By stacking the triggers and allowing his check to resolve followed by theirs, he will leave and then cause either or both to trigger. Thus each turn, if left alone, your Call for Unity is going to cause a massive problem for your enemies, especially if you build a deck built around populating large numbers of 1/1 spirits or soldiers.
Solemn Recruit also works well by itself, as it has double strike, is really cheap, and could quickly turn into a problem if you have any boost spells, while not taxing your mana.
See you tomorrow when I delve into some blue spells,
The General