I played this on paper at my LGS for OGW Gameday and took 2nd place.
Round 1: 1-0 rounds (2-0 games) vs. RW Aggro
This guy had a brew of Allies and goblin token-generators, souping them up with equipment like Captain's Claws.
He couldn't play out his threats fast enough in either game. Chandra, Flamecaller swept them away right on queue in the first game, and with all the sweepers I brought in from my sideboard for the second game he didn't have a chance.
Round 2: 1-1 rounds (3-2 games) vs. RGB Eldrazi Ramp
This guy is a spikey-type and he was playing a stock RG Eldrazi Ramp deck with all the usual suspects, Ugin and Ulamog with World Breakers and Thought-Knot Seers as sidekicks, to go along with Transgress the Mind. This was the deck my previous deck couldn't beat, so I was eager to test it out against a real opponent.
I won one of the first two games with a big Crater's Claws doing it's job, and lost one when he topdecked an Ugin, the Spirit Dragon when my Chandra, Flamecaller elemental tokens would have killed him on the next turn. He was NOT at 10 mana, so he wouldn't have been able to Exile her away with an Ulamog, the Ceaseless Hunger.
The last game came down to Turn 5 after Time in Round. I had several turns to draw either Crater's Claws or Chandra, Flamecaller to finish him off, but I drew lands and then he put out a Void Winnower that I couldn't block with my Endless One or Zendikar Incarnate because their CMC is Even.
I like to play rogue, spicy singletons, so I had a single Elemental Bond in the deck as a last-minute replacement for a fourth Nissa, Vastwood Seer
Flip, and I had that out in one game alongside Chandra, Flamecaller, so her +1 ability was also drawing me two cards per turn. I had about 4 turns in a row that I had to discard one or two cards at the end of turn, which is an embarrassment of riches. Sylvan Advocate enters the battlefield as a 4/5 (we checked with a Judge), so he also draws you a card if you're at 6 lands or more, as does the 4/4 Ashaya token from Nissa, Sage Animist
Flip, turning her -2 ability almost into her +1 ability for free, except for the fact that her Loyalty drops to dangerously low levels.
Round 3: 2-1 rounds (1-0 games) vs. Mardu Green
This guy's deck was VERY ambitious, playing Siege Rhino alongside Goblin Dark-Dwellers and Chandra, Flamecaller. We only played one game and then he dropped, since we were out of the prizes. It was a LONG grindy game with me gaining life and extra creatures from Pulse of Murasa and him gaining life from Siege Rhino and extra removal for my creatures from Goblin Dark-Dwellers recurring Crackling Doom from the yard.
I had a satisfying moment when he had Siege Rhino in play, then played out a Kalitas, Traitor of Ghet AND a Den Protector facedown, that he didn't have any mana to flip, while I had Chandra, Flamecaller sitting on the board at 5 loyalty. Chandra had to make the ultimate sacrifice to make it happen, but that was a very satisfying 5-damage boardwipe.
So he's a good player who was making some small mistakes after being on Tilt from getting knocked out of the prizes with a loss from the previous round, but I've seen repeatedly that this deck has the staying power to go long in grindy games, and the cards just keep getting stronger as the game goes on, and more mana gets on the table, because I have so many cards with X in their casting costs, like Endless One and Crater's Claws, or bonuses for lands in play, like Zendikar Incarnate or Sylvan Advocate, to go along with mana sinks like the activated ability on Mina and Denn, Wildborn or Rogue's Passage.
The Rogue's Passage kept flying under people's radar, since it's not a commonly-played card, and can lead to some big blowouts when people think they're safe with a chump blocker and forget that my guy can be unblockable, withOUT sacrificing the land. I'm seeing people play lands that have utility in the late-game, or when you flood on lands, like Blighted Gorge, but I like that I can use Rogue's Passage as many times as I care to pay for.
I'll make a separate update comment with my take on which cards overperformed or underperformed, and the tweaks I've made since Gameday.
