Pool:
2 x Yoked Ox
1 x Cavalry Pegasus
1 x Oreskos Sun Guide
1 x Oreskos Swiftclaw
1 x Stonewise Fortifier
1 x Traveling Philosopher
1 x Harvestguard Alseids
1 x Eagle of the Watch
1 x Great Hart
1 x Dawnbringer Charioteers
1 x Supply-Line Cranes
1 x Celestial Archon
1 x Silent Artisan
1 x Ajani's Presence
1 x Battlewise Valor
1 x Excroiate

2 x Triton Shorestalker
1 x Sigiled Starfish
1 x Riptide Chimera
1 x Thassa's Emissary
1 x Mnemonic Wall
1 x Annul
1 x Retraction Helix
1 x Triton Tactics
1 x Font of Fortunes
1 x Gainsay
1 x Stratus Walk
1 x Nullify
1 x Dissolve
1 x Countermand
1 x Pull from the Deep

2 x Pharika's Chosen
1 x Baleful Eidolon
2 x Returned Reveler
1 x Felhide Petrifier
1 x Rotted Hulk
1 x Doomwake Giant
1 x Loathsome Catoblepas
1 x Thoughtrender Lamia
2 x Cruel Feeding
1 x Viper's Kiss
1 x Cast into Darkness
1 x Font of Return
1 x Nyx infusion
1 x Tormented Thoughts
1 x Weight of the Underworld
1 x Silence the Believers

2 x Deathbellow Raider
1 x Sigiled Skink
1 x Bladetusk Boar
1 x Coordinated Assault
1 x Dragon Mantle
1 x Magma Spray
1 x Titan's Strength
1 x Fall of the Hammer
1 x Font of Ire
1 x Thunderous Might
1 x Searing Blood
1 x Flurry of Horns
1 x Rollick of Abandon

1 x Renowned Weaver
2 x Golden Hind
1 x Setessan Oathsworn
1 x Ravenous Leucrocota
1 x Nessian Asp
1 x Vulpine Goliath
1 x Font of Fertility
1 x Karametra's Favor
1 x Nylea's Presence
1 x Savage Surge
1 x Desecration Plague

1 x Ragemonger
1 x Sentry of the Underworld
1 x Anax and Cymede
1 x Stormchaser Chimera
1 x Fleetfeather Cockatrice
1 x Chromanticore

1 x Chariot of Victory
1 x Hall of Triumph
1 x Opaline Unicorn

The last 8 cards make we want to go 5 color. I'll take a more serious look later.

I know this is late, but I didn't have the time before. I'll play far, no peeking, build first:
1 x Cavalry Pegasus
2 x Deathbellow Raider
1 x Oreskos Sun Guide
1 x Oreskos Swiftclaw
1 x Sigiled Skink
1 x Stonewise Fortifier
1 x Anax and Cymede
1 x Eagle of the Watch
1 x Harvestguard Alseids
1 x Bladetusk Boar
1 x Dawnbringer Charioteers
1 x Celestial Archon
1 x Supply-Line Cranes

1 x Ajani's Presence
1 x Coordinated Assault
1 x Dragon Mantle
1 x Magma Spray
1 x Titan's Strength
1 x Battlewise Valor
1 x Fall of the Hammer
1 x Hall of Triumph
1 x Excoriate

8 x Plains
7 x Mountain
2 x Swamp


Pretty straightforward RW aggro. Great curve, four rares, all of them pretty bomby. So undemanding color-wise I even included two Swamps for the Raider regeneration. You have some nice sideboarding options, Searing Blood, Rollick of Abandon, Thunderous Might, Stormchaser Chimera-well, maybe not that one

Peek time.

So you went WB. White is a definite, but Anax is such a bomb with all the enablers in your pool. RW has almost a draft aggro curve; in Sealed, it should roll over anybody who stumbles even just a little bit. And I would definitely play Hall of Triumph, probably over a Cruel Feeding.

5 color aggro!
//Spells
1 x Fall of the Hammer
1 x Font of Fertility
1 x Karametra's Favor
1 x Magma Spray
1 x Nylea's Presence
1 x Silence the Believers
1 x excoriate

//Creatures
1 x Baleful Eidolon
1 x Oreskos Sun Guide
2 x Golden Hind
1 x Eagle of the Watch
1 x Felhide Petrifier
1 x Anax and Cymede
1 x opaline unicorn
1 x Bladetusk Boar
1 x Thassa's Emissary
1 x Dawnbringer Charioteers
1 x Celestial Archon
1 x Chromanticore
1 x Fleetfeather Cockatrice
1 x Nessian Asp
1 x Sentry of the Underworld

EDIT: Lands
2 x island
4 x plains
4 x mountain
4 x swamp
3 x forest

(seriously, I think RW was the way to go... silence the believers is bomby but your black is bad and you can't splash it)