I gave it a try a bit. Sneaky deck.

I'd like to see more colorless mana sources to support the Dimensional Infiltrator. I'd suggest Warped Landscape instead of the Evolving Wilds. They're similar but coming into play untapped seems to fit more when your deck craves mana efficiency.

Also, I think with all of the instant speed effects and low cost spells in the deck, Day's Undoing seems better than Pore Over the Pages.

jawz Thanks! I totally forgot about Warped Landscape, and I think you're right. The only reason Evolving Wilds is in the deck is as a way to enable delirium for Topplegeist, so Warped Landscape fits that role perfectly! As for Pore Over the Pages, it too was a way to enable delirium and was a flex-slot. I was unsure what should go there, and debated Angelic Purge. I'll try out Day's Undoing and see how it looks. Thanks again for your suggestions! :)

Seems really solid, I definitely like it. I would consider adding in Always Watching especially if you add in that Dragonlord Ojutai in the maybeboard.

I Absolutely Love This Deck! When i first started playing i built a deck similar to this and did rather well in the local tournaments, but when theros and M15 rolled, i wanted to cry. but now the power of U/W is back and ready to go!!! the only thing i have considered as an addition is Sphinx of the Final Word Maybe in the sideborad. Otherwise, it's Great!! +1 from me!

I like it. This deck is actually the only deck that's given me trouble last 2 weeks at FNM. I may suggest Caves of Koilos or Yavimaya Coast or Shivan Reef etc, since it can produce colorless for Dimensional Infiltrator while not locking you out of your other colors. I run Caves of Koilos in my mono black deck for this purpose. +1.

AngelOfDivinity- I like the pain land idea. Maybe I'll try out a few. I'm just not that interested in activating Dimensional Infiltrator that much though, tbh. I feel like there are generally better uses of two mana than Maybe saving a guy. But it does seem useful for going longer into a game. Thanks!

How would Ongoing Investigation work with that deck, instead of Thraben Inspector? Also, I wonder how Invocation of Saint Traft would play if worked in there?

ronniedubbz- I think Ongoing Investigation would work similarly to Thopter Spy Network from the sideboard. I can see it being good, but I think to make it truly work the deck would then need green in it to activate the ability. I don't know how long Thraben Inspector will stay in the deck. I'm looking at replacing it already with some sweet spoiled cards from Eldritch Moon! Overall, I do like considering Ongoing Investigation for the sideboard.

Use Yavimaya Coast... it would provide the green AND BLUE as well colorless.

Invocation of Saint Traft is similar to how Ensoul Artifact and Ornithopter worked, but on Turn 3 rather than turn two.. plus if you can Glint or Negate your opponent's Stasis Snares or Silk Wraps (to protect your 1/1 or 2/1 flyers) by the time you bring in Thunderclap Wyvern, you're all good. I have a similar iteration of the deck: http://tappedout.net/mtg-decks/affinity-for-flying/

ronniedubbz Well, after seeing the new Tamiyo spoiled green does look very, very appealing...

Spell Queller is just dying to be in this deck. also if you want to splurge, Archangel Avacyn  ^Flip. other fun shenanigans can be had with Mizzium Meddler and Harbinger of the Tides

AwesomeOctopus- Yeah, I'm going to update the deck and make it even more spirit themed. Just waiting for all the cards to be added to TappedOut so I can make it with all the new cards. Spirit support strong in EMN! :)

I would recommend Always Watching as giving your creatures vigilance and +1/+1 is a HUGE boon. However, Dromoka's Command is ruling standard, so maybe its a better choice after it rotates out. Reflector Mage is a great tempo play, and combos with Essence Flux. I'd remove the Topplegeists, as you aren't getting the full benefit of them because delirium is hard to trigger in your deck.