I really like the aggro decks going up around Athreos, God of Passage . It's great to see B/W being such a huge archetype again with the new set. I think you have a great start on this one.

As far as aggro decks go, though, there are an aweful lot of 3 drops here, and very little leading up to it. I think the least compatible 3 drops you have up there would be Frontline Medic and Brimaz, King of Oreskos (medic because who cares if your creatures are indestructible, Brimaz because tokens don't matter when they die, and he's a cat so you don't get the zombie from Xathrid). I fully understand wanting to keep Brimaz around, because, holy crap, Brimaz. In which case, I would probably look to replacing either Dauntless Onslaught or Dictate of Erebos . I would probably replace them with a mix of Cartel Aristocrat (easy way to trigger Athreos' ability, and a great blocker), and either Daring Skyjek or Gnarled Scarhide (heavy aggro creatures).

Dictate is probably the easiest to drop out of all of these, because you'll really want to have won by turn 5 or 6 with an aggro deck. If you're looking to do something a bit more mid-rangy, you can probably spread it out more evenly and get by with the Dictates left in, but it's not a very aggro friendly card.

Good luck with the build though! And most importantly, have fun first. My suggestions are stupid if they slow down your fun.

Also, if you have the time, please stop by my own deck, Why Won't You Stay Dead?!, and let me know what you think about the mid-range enchantment build I'm working with around Athreos. Maybe it'll give you some ideas, too.

@TheGreatLiar I completely agree, tokens seem to be a little obsolete but this was made in like, 20 minutes around a card I had barely seen. XDEither way, I probably will drop Brimaz, King of Oreskos because of $$$ problems. I haven't much knowlegde of 2 mana or less cards good for the deck. Cartel Aristocrat seems really mean with Athreos. I like seeing B/W getting play and if I can get this deck into a manageable price and a good deck still, I shall make it. :D

So many decks are running dual lands because the are almost a necessity but I wanted to make a dual colored deck without them so, don't comment saying Temple of Silence or Godless Shrine