Eerie Interlude may be a possibility since it will retrigger all the allies. I'd also replace Allied Reinforcements with more kill spells like Grasp of Darkness or even Ruinous Path. Four mana for only two allies is a bit much especially when you are getting them with Retreat to Emeria.

RainbowGuts- Thanks for the idea. I liked the Allied Reinforcements because of the gain drain proc, but Eerie Interlude does the same effect better and cheaper. I'll side board the other two recommendations in case I go against a creature heavy deck.

You could always sideboard the rest of playsets. For my deck Anguished Unmaking is a wonderful removal spell.

You really should add in at least one more Gideon, Ally of Zendikar

Have you seen Tree of Perdition?

Cryptolith Fragment could work as well, unfortunately with your deck it would be quite difficult to flip but still gives mana and hurts your opponent?

Delta-117 I really like Tree of Perdition and may sideboard it against really aggressive decks, even combo it off Triskaidekaphobia for an easier win.

As for Cryptolith Fragment, I may add it despite it's lack of flip. Even though I don't need the mana as much, a mana rock that hurts my opponents could be very useful.

Thanks for the feedback!

What are your thoughts about adding Ayli, Eternal Pilgrim and Accursed Witch  ^Flip?

I know neither of them are allies but Ayli can be a steady income of life gain and can become an exile machine when above 30 life, and Accursed Witch acts as a sacrifice outlet to Ayli or as a chump blocker (or even aggressive suicide swinger if need be) to transform in its curse form, which will drain the opponent every turn (like drama's emissary)?

What do you think?

Manemaan- I have considered Accursed Witch  ^Flip and have actually playtested with it. However, because it is not an ally and the card is relatively expensive, I have had a hard time finding a proper place for it.Ayli, Eternal Pilgrim is an interesting card that I glanced over every time I saw it because it wasn't an Ally. However, I may have to try it out, seeing as a 2/3 deathtouch for is great as a basic card alone.

While theorycrafting and looking up cards to buy to construct this deck (as I really love the deck), it seemed to me you dont have an awful lot of finishers.

I happened to find a Defiant Bloodlord in my collection.I thought about possible interactions with the deck (as for flavour itll fit right in), and this could make for a pretty decent finisher combined with for example Blighted Steppe, which is easy to slot in twice for a plains or swamp.

Summon the bloodlord, sac the steppe, gain a bunch of life at once, trigger the lord's ability, suck the life out of your opponent.

I could definitely sideboard some Defiant Bloodlords. I feel like they are too expensive for the deck, especially due to the deck's faster nature. However, against slower decks, they could be lethal if they stay on the field.

Any changes planned for the lose of Origins/Dragons to Kaladesh?