Aside from being a human, which is a very relevant creature type in Commander, Modern and basically every other MTG format, Esper Sentinel is good because it reads: Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays X, where X is Esper Sentinels power. Its a bit like Rhystic Study, but the cost can be far higher if youve got things that make humans stronger or you can put +1/+1 counters onto Esper Sentinel
Boros is traditionally poor from behind, so by all means punish them if they stumble and you have a good curve
The decks best win condition is probably Liberty Prime, who is a way above-rate creature
Box EV Disconnect When I saw the $50,000 price tag for a booster box from Legends , I must admit I was initially quite baffled
Waylay (S) Waylay saw extremely brief play at U.S