I've never had this much fun playing Modern.
I mean that seriously. I've played a lot of Modern with a lot of decks. Merfolk is my favorite, but I've played everything from Burn to Jund to Collected Company decks to Living End to Storm to Grixis Control. I've competed on all parts of the axis and seen just about everything Modern has to offer.
But I've never had this much fun playing a deck before.
If there was ever a way to play Commander in Modern, this is it. Infinite mana dorks turbo out Planeswalkers and they take over the game. Not only is the assortment of super friends good enough to grind out games on their own, but the deck becomes truly broken when Doubling Season is involved. With Doubling Season in play, each Planeswalker enters play with double the loyalty it would normally have, meaning you can instantly ultimate many Planeswalkers in the deck, living the dream you almost never live in Modern.
More importantly, that means in some cases an unstoppable Emrakul, the Aeons Torn. Obviously Nahiri, the Harbinger is the go-to way to do this, and with Doubling Season out, Nahiri, the Harbinger conveniently enters with the exact eight loyalty counters needed to ultimate. Jace, Architect of Thought does the same, while Ral Zarek enters play and immediately starts flipping coins for Time Walks. Elspeth, Sun's Champion ultimates immediately, as does Xenagos, the Reveler. Nissa, Gideon, Ally of Zendikar, Chandra, Flamecaller and Gideon Jura don't have that same luxury, but they do all produce tokens – and with Doubling Season out they produce double the tokens. And if you're lucky enough to have two Doubling Seasons out, suddenly everything produces quadruple the normal amount, given the way the effects stack. In one of the videos, I played an Elspeth, Sun's Champion; deciding the best way to utilize 16 loyalty counters was not easy.
It's simple, elegant, beautiful, and just a lot of fun to play. Oath of Nissa ties everything together seamlessly, finding you mana dorks or lands for the first few turns or planeswalking threats for the later turns, all while allowing you cast four colors of Planeswalkers with a collection of basic Forests.
The Blood Moon may not be necessary, but thanks to Oath of Nissa it's nearly a freeroll. We have 10 mana creatures that fill our colored needs, and the Oath of Nissa bump that count up to 14, allowing us to effectively ignore our own Blood Moon while slowing down or locking out opponents. Even in the situations where Blood Moon isn't backbreaking it's almost always still good, and just slowing down your opponents a little goes a long way while you're setting up board dominance with Planeswalkers.
The sideboard contains the usual slate of go-to white sideboard cards, while filling out the Blood Moon roster and adding the spicy Worship tech against decks that can't go around it.
I'm not sure if you'll see this deck appearing in the Top 8 of a Grand Prix any time soon, but I found the concept on an undefeated Modern league on MTGO, and after playing with it this week I can guarantee that you'll be able to win matches at FNM with this. And win or lose, there is not much more fun than playing Doubling Season and Planeswalkers in Modern.
Update: Tamiyo, Field Research was revealed after I recorded this article, and she's absolutely bonkers in the deck.
Not only is her ultimate arguably insane off a Doubling Season, refilling your hand with Planeswalkers to immediately cast, but even in the average case scenario she's good. The minus ability does wonders protecting your Planeswalkers, while the plus ability allows you to get value off of random Noble Hierarch triggers, or in a pinch even targeting your opponents' creatures to make their counterattack a little less devastating. Overall I'm very excited for what Tamiyo can do for this deck, and I'm excited to give her a shot soon!