So, I thought that I would come back after a long hiatus and start with a build question from my midnight release sealed pool. I am curious to see how other members of the forum would build this. I chose White for my color and ended up with this:

White

2 x Akroan Mastiff
2 x Chosen by Heliod
1 x Dawnbringer Charioteers
1 x Deicide
1 x Eagle of the Watch
1 x Font of Vigor
1 x Gift of Immortality
1 x Glare of Heresy
1 x God-Favored General
1 x Griffin Dreamfinder
1 x Leonin Iconoclast
1 x Mortal Obstinacy
1 x Observant Alseid
1 x Oreskos Swiftclaw
2 x Ray of Dissolution
1 x Reprisal
1 x Sightless Brawler
1 x Skyspear Cavalry
2 x Stonewise Fortifier
1 x Sunbond
1 x Supply-Line Cranes
1 x Traveling Philosopher

Blue

1 x Annul
1 x Benthic Giant
1 x Chorus of the Tides
1 x Font of Fortunes
1 x Hubris
1 x Interpret the Signs
1 x Lost in a Labyrinth
2 x Pin to the Earth
1 x Pull from the Deep
1 x Sigiled Starfish
1 x Thassa's Devourer
1 x Thassa's Ire
1 x Tromokratis
1 x Vaporkin
1 x Wavecrash Triton

Black

2 x Aspect of Gorgon
1 x Brain Maggot
1 x Dark Betrayal
1 x Feast of Dreams
1 x Felhide Brawler
1 x Keepsake Gorgon
1 x King Macar, the Gold-Cursed
1 x Necrobite
1 x Pharika's Chosen
1 x Scourgemark
1 x Shrike Harpy
1 x Tormented Thoughts

Red

1 x Bladetusk Boar
1 x Everflame Eidolon
1 x Flamespeaker Adept
1 x Font of Ire
1 x Gluttonous Cyclops
1 x Harness by Force
1 x Ill-Tempered Cyclops
1 x Impetuous Sunchaser
1 x Kragma Butcher
1 x Magma Spray
1 x Minotaur Skullcleaver
1 x Satyr Hoplite
1 x Satyr Rambler
1 x Scouring Sands
2 x Starfall
1 x Stoneshock Giant
1 x Wild Celebrants

Green

1 x Agent of Horizons
1 x Culling Mark
1 x Fade into Antiquity
1 x Font of Fertility
1 x Mistcutter Hydra
1 x Nessian Game Warden
1 x Nylea's Presence
1 x Oakheart Dryads
1 x Pheres-Band Centaurs
1 x Renowned Weaver
1 x Satyr Grovedancer
1 x Satyr Piper
1 x Swordwise Centaur

How would you guys build this pool? I will fully admit it took most of the build time for me.

Basically King Macar is probably your best card, but black is shallow.
Deepest color after that is white. Deck will have mana issues, but I don't think RB or RW is better.
Your fixing is King Macar??

Black / White

1 x Pharika's Chosen
1 x Brain Maggot
1 x Felhide Brawler
1 x Oreskos Swiftclaw
1 x Sightless Brawler
1 x Eagle of the Watch
1 x Observant Alseid
2 x Akroan Mastiff
1 x King Macar, the Gold-Cursed
1 x Shrike Harpy
1 x Dawnbringer Charioteers
1 x Keepsake Gorgon
1 x Supply-Line Cranes
1 x Skyspear Cavalry

1 x Scourgemark
1 x Chosen by Heliod
1 x Necrobite
2 x Aspect of Gorgon
1 x Reprisal
1 x Mortal Obstinacy

9 plains
9 swamps

Could also run another chosen by heliod over a land. I actually like the deathtouch combat tricks with the early blockers, rather than enchantment hate. But there is lots of enchantment hate if you need it.
Brawler is strictly worse than one of the white bears but I think for mana harmony it's better (if you get stick on BB) for a turn.

Side//
2 x Ray of Dissolution
1 x Chosen by Heliod
1 x Leonin Iconoclast
1 x Glare of Heresy
1 x Dark Betrayal
1 x Feast of Dreams
1 x Tormented Thoughts
1 x Font of Vigor
1 x Gift of Immortality
2 x Stonewise Fortifier
1 x God-Favored General
1 x Griffin Dreamfinder
1 x Sunbond
1 x Traveling Philosopher

I think this deck is pretty solid assuming you can get exactly plains/plains/swamp/swamp.

I agree Zenbitz. But I would totes play the gift of immortality. I would love to gift king macar.

As I said, this pool took me almost the whole time, and Zen's build was exactly why I was struggling, though I'm not sure why Zen left out Feast. Looking at the pool, I immediately knew White was the deepest color, and that I should set aside Blue and Green, though I kept Mistcutter Hydra on top of the pile in case I found I could splash. King Macar was drawing me to black and I was looking at it for the longest time, thinking about playing white/black. I was very aware of the limitations with the deck though.

When I was playing in a Theros tournament a while back, I overheard a pro in my area talking about Theros limited and he said "Theros is a set that makes bad players look good." At the time, I thought he was only talking about the Bestow mechanic, but I've come to realize there was more to it. Cards like Scourgemark and Chosen by Heliod are cards that, in any other block, would likely be 22nd or 23rd cards at best. Heroic, however, turns what might be considered a bad play into a strategic and calculated risk, either by pumping up the creature faster such as Favored Hoplite, or by an effect going off that gains an advantage such as Leonin Iconoclast that mitigates a chance at being 2 for 1'd. However, this pool does not have the Heroic cards you would ideally want for such a build.

2nd, this deck seems ridiculously dependent on getting King Macar or Dawnbringer Charioteers going. The rest is solid, but without enough removal, you need to win before any of your opponents potential bombs can go off. Cards like Chosen and Scourgemark can get you to them, but especially with the Charioteers, you want those to go on them.

Now I understand this is sealed, and if you have no better options, you go with the best you have and live with it. However, to me, I felt I had a better option. This is the build I went with:

1 x Akroan Mastiff
1 x Bladetusk Boar
1 x Dawnbringer Charioteers
1 x Everflame Eidolon
1 x Flamespeaker Adept
1 x Ill-Tempered Cyclops
1 x Kragma Butcher
1 x Leonin Iconoclast
1 x Minotaur Skullcleaver
1 x Observant Alseid
1 x Oreskos Swiftclaw
1 x Skyspear Cavalry
1 x Stoneshock Giant
2 x Stonewise Fortifier
1 x Supply-Line Cranes

1 x Deicide
1 x Harness by Force **MVP**
1 x Magma Spray
1 x Ray of Dissolution
1 x Reprisal
2 x Starfall

9 x Plains
8 x Mountain

Our local shop runs it such that we play until one person is undefeated and then payout goes from there, so our midnight release went six rounds (and would have been seven if the third undefeated hadn't lost to the person he got paired down against), and I thought when it was initially announced at 7 rounds that would go 4-3, maybe 5-2. I went 6-0 and still can't believe it happened. The deck just beat down more often than not, but was surprisingly able to win when that beatdown failed. A few things on the deck:

Harness by Force was my MVP. I am one of those people that is notoriously down on Threaten effects unless you have a way to sac the creature you steal. But Harness is less like Threaten and more like Insurrection. Every time I drew it, it turned the game into a victory, and usually it was just for two creatures from my opponent. It single-handedly won round six by finishing both games. I thought it was a good card, but it turned out to be a legitimate bomb.

Deicide and Ray of Dissolution were fantastic. Instant speed enchantment removal messed with combat in my favor more often than not. It also took out Master of the Feast after the card draw on upkeep in one match. I even cleared out a Pin to the Earth off a Cyclops in combat for lethal after it wasn't blocked.

Starfall worked decent. A poor man's Punish the Enemy to be sure, but the extra damage helped when it worked. Not something I would ever play two of again if I could get away with it though. Too costly.

I wish the Iconoclast was a second Mastiff now though. I never had anything to use off the Heroic when I did draw it, and the extra power was not worth the ability to lock down a Bestowed creature.

Just a cut and paste error, probably. Probably cut aspect of gorgon for it.

I did like your red cards too... clearly beat down is where it's at.

I can definitely understand that. I've done it more than once myself on the old forum.

I was really surprised how well the red and white worked together. The red creatures that did the most work though were the two Monstrous guys and the Boar. I kept siding out the Adept for one of my sideboard cards once I knew what type of matchup I was in. ^^;