True-Name won't work in Modern. Legacy and Commander only...
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Echoing Truth and Cyclonic Rift are also really good bounce cards. Rifts are kinda spendy now, but really good.
Since you have the Chancerys and are splashing white a bit, Windborn Muse could replace the propagandas. It's modern legal, same effect, and it's a flying blocker. On a separate note, adding Blighted Agent has a chance to get you a MUCH faster win, since infect only needs to hit for 10. Would be at MINIMUM twice as fast as any other 1/1 in the deck. Equipment wise, Silver-Inlaid Dagger is really cheap and a HUGE boost to humans (Stalker, Agent, etc.). Grafted Exoskeleton and Corrupted Conscience can also give infect to your other dudes. I use Stalker/Corrupted Conscience in my bant aura deck. Good build though. My roommate built something similar a while back, and my aura deck revolves around the same principals.