First question: Why not Ezuri, Renegade Leader or Kamahl, Fist of Krosa instead? Ezuri is easy. I don’t have to limit myself to elves. Kamahl is a bit more difficult. First answer is I have done Kamahl and Baru is something new. Second answer is that Baru can bring something quite unique to the table. Each of the ramp spells in your deck becomes a mini-Overrun. Or in some cases something much, much more.
Lands
One of the major flaws in many decks on the Internet is that they skimp on lands (going sometimes as low as 35). You shouldn’t do it ever, but here’s a situation where you definitely don’t want to do it. Each time you hit a land drop its +1/+1 and trample for all your creatures. You don’t want to run out of them in your deck either (although its happened to me).
Therefore, I started with 40 Forests and moved up from there with six more lands. I used Windswept Heath and Wooded Fothills, as well as Evolving Wilds and Terramorphic Expanse because they were readily available to me, but of course, if you happen to have more fetches, use those as well. They are very powerful here, when you can pump your team any time with them.
Also, I have Terrain Generator and Thawing Glaciers in the deck. Two more ways to control when the team gets pumped.
That’s a total of 46 lands.
Ramp
Of course, I use pretty much all the ramp spells available here:
As well as some creatures with similar abilities:
Elvish Pioneer is surprisingly good here, because the ability to trigger Baru is important later in the game as well.
Cloudstone Curio could be put into the same category. It does have the benefit of returning cards such as Avenger of Zendikar and Craterhoof (if it wasn’t enough to end the game) to your hand, but it can also be used to return a land and replay it on the next turn, unless you have a way to play extra lands or you returned a Forest to your hand after fetching or ramping.
Horde
Plenty of ways to generate a bunch of tokens and then make them big. I’m not sure Overrun is actually needed, but why not?
Utility
You know… card draw, some enchantment / artifact / land control. Bow of Nylea does a lot, but most importantly it gives deathtouch to creatures that already have trample (most of the time).
Baru Horde
As always with my EDH decks, the list features some cards I just like to play and cards I’d rather just try out. It isn’t fully optimized (if there even is such a thing), but rather based on personal tastes and experiences on building decks.
For example, the list doesn’t have many creatures, but I still put Garruk, Caller of Beasts into the deck, because I don’t get to play him that much.