The Sword and Shield set with the most valuable cards is Evolving Skies , notorious for its extremely low pull rates
That said, while Exploration, Burgeoning, and Avenger of Zendikar are amazing in the right deck, theyre not essential to winning games and many decks dont actually need or want them
If youre just testing a design standard might be enough
Every once in a while it shows up in Modern decks, but unless you have a specific play pattern in mind, youre better off with a more generic tutor like Chord of Calling
I am the terror that flaps in the night, I am the batteries that are not included, I am the card thats not in this set
Hindering Light can target a spell that has multiple targets, as long as at least one of those targets is you or a permanent you control