Plaza of Heroes There's a deckbuilding hoop to jump through here, so not every deck will be able to use Plaza of Heroes, but it will be a welcome addition to any pile of cards with a good proportion of legendary spells (including your commander of course)
Its +1 can help you deal with an opponents attacker since it gives your creature a +1/+1 counter and first strike The -1 ability allows you to make a chump blocker, while the -2 can immediately deal with any attacking threat that is tapped, allowing you to exile it and gain 2 life in the process
Anytime a nontoken, non-Angle creature you control dies, you get to bring that card back to the battlefield, turning into an Angel and giving it flying and a +1/+1 counter
Move Cost Symbol Location cards have a move cost
Again, in four-player thats a huge boon
Unfortunately, I also opened a long list of underwhelming, sub-$1 rares to bring the box's total value down below par