You'll open 72 cards in total across your six packs, select 40 of them, and then play games against opponents who have also built Sealed decks

We Are Not Worthy | Commander | Stephen Johnson Commander (1) 1 Reidane, God of the Worthy Creatures (19) 1 Alms Collector 1 Eidolon of Rhetoric 1 Giver of Runes 1 Keeper of the Accord 1 Knight of the White Orchid 1 Kor Cartographer 1 Mother of Runes 1 Oreskos Explorer 1 Pilgrim's Eye 1 Resolute Watchdog 1 Selfless Savior 1 Selfless Spirit 1 Serra Ascendant 1 Spirit of the Labyrinth 1 Silent Arbiter 1 Skittering Surveyor 1 Solemn Simulacrum 1 Thalia, Guardian of Thraben 1 Weathered Wayfarer Instants (10) 1 Dispatch 1 Fate Forgotten 1 Generous Gift 1 Invoke the Divine 1 Path to Exile 1 Return to Dust 1 Settle the Wreckage 1 Silence 1 Swords to Plowshares 1 Teferi's Protection Sorceries (8) 1 Approach of the Second Sun 1 Austere Command 1 Divine Reckoning 1 Doomskar 1 Fumigate 1 Open the Armory 1 Rout 1 Wrath of God Enchantments (11) 1 All That Glitters 1 Armored Ascension 1 Aura of Silence 1 Authority of the Consuls 1 Blind Obedience 1 Celestial Mantle 1 Ethereal Armor 1 Ghostly Prison 1 Land Tax 1 Smothering Tithe 1 Sphere of Safety The only thing I've got real second thoughts about is the lack of Swiftfoot Boots and Lightning Greaves

Return from the Wilds
Dawnsire might not win you the game directly, but hell absolutely ruin someones day in a spectacular fashion
Mari, The Killing Quill giving deathtouch would be good on its own, but it also acts as graveyard hate as all creatures that die are exiled, preventing them from being reanimated later
Furthermore, it can be also appropriate to counter the Initiative creatures themselves while attacking the mana development of the deck