The Brothers' War Arena Booster has no variants:
Explore this pack in Sealed.

Sheets

Sheet common (color balanced)

At rate 1/101 (0.99%)
Aeronaut Cavalry
Aeronaut's Wings
Air Marshal
Airlift Chaplain
Ambush Paratrooper
Argothian Opportunist
Argothian Sprite
Ashnod's Intervention
Bitter Reunion
Blanchwood Prowler
Blitz Automaton
Boulderbranch Golem
Burrowing Razormaw
Carrion Locust
Citanul Stalwart
Clay Revenant
Coastal Bulwark
Combat Courier
Conscripted Infantry
Curate
Deadly Riposte
Depth Charge Colossus
Desynchronize
Disenchant
Disfigure
Dredging Claw
Dwarven Forge-Chanter
Emergency Weld
Energy Refractor
Epic Confrontation
Evolving Wilds
Excavation Explosion
Fallaji Archaeologist
Fallaji Chaindancer
Fog of War
Gaea's Gift
Giant Growth
Gix's Caress
Gixian Infiltrator
Gixian Skullflayer
Gnarlroot Pallbearer
Goblin Blast-Runner
Goblin Firebomb
Goring Warplow
Hoarding Recluse
Kill-Zone Acrobat
Koilos Roc
Lat-Nam Adept
Loran's Escape
Machine Over Matter
Mightstone's Animation
Military Discipline
Mine Worker
Mishra's Domination
Mishra's Juggernaut
Mishra's Onslaught
Moment of Defiance
Overwhelming Remorse
Penregon Strongbull
Perimeter Patrol
Phalanx Vanguard
Power Plant Worker
Powerstone Engineer
Powerstone Fracture
Prison Sentence
Ravenous Gigamole
Raze to the Ground
Recommission
Retrieval Agent
Roc Hunter
Rust Goliath
Scatter Ray
Scrapwork Cohort
Scrapwork Mutt
Scrapwork Rager
Shoot Down
Sibling Rivalry
Stern Lesson
Stone Retrieval Unit
Supply Drop
Survivor of Korlis
Swiftgear Drake
Tawnos's Tinkering
Third Path Savant
Thraxodemon
Tocasia's Dig Site
Tocasia's Onulet
Tomakul Honor Guard
Tomakul Scrapsmith
Tower Worker
Trench Stalker
Union of the Third Path
Unleash Shell
Urza's Rebuff
Veteran's Powerblade
Warlord's Elite
Wasteful Harvest
Weakstone's Subjugation
Whirling Strike
Wing Commando
Yotian Medic

Sheet uncommon

At rate 1/80 (1.25%)
Alloy Animist
Arbalest Engineers
Argivian Avenger
Arms Race
Ashnod's Harvester
Audacity
Battery Bearer
Battlefield Butcher
Blanchwood Armor
Bushwhack
Calamity's Wake
Combat Thresher
Corrupt
Cradle Clearcutter
Defabricate
Demolition Field
Disciples of Gix
Dreams of Steel and Oil
Evangel of Synthesis
Fallaji Dragon Engine
Fallaji Excavation
Fallaji Vanguard
Flow of Knowledge
Forging the Anchor
Gaea's Courser
Giant Cindermaw
Gnawing Vermin
Go for the Throat
Great Desert Prospector
Gruesome Realization
Gurgling Anointer
Haywire Mite
Heavyweight Demolisher
Hero of the Dunes
Horned Stoneseeker
Hulking Metamorph
Involuntary Cooldown
Iron-Craw Crusher
Junkyard Genius
Keeper of the Cadence
Lay Down Arms
Levitating Statue
Loran, Disciple of History
Mask of the Jadecrafter
Mass Production
Meticulous Excavation
Mishra's Research Desk
Mishra, Excavation Prodigy
Monastery Swiftspear
No One Left Behind
Obliterating Bolt
Obstinate Baloth
Pyrrhic Blast
Reconstructed Thopter
Recruitment Officer
Repair and Recharge
Sardian Cliffstomper
Sarinth Steelseeker
Skyfisher Spider
Slagstone Refinery
Spectrum Sentinel
Splitting the Powerstone
Spotter Thopter
Static Net
Steel Exemplar
Su-Chi Cave Guard
Symmetry Matrix
Take Flight
The Fall of Kroog
Third Path Iconoclast
Thopter Architect
Thopter Mechanic
Thran Power Suit
Thran Vigil
Transmogrant Altar
Urza, Powerstone Prodigy
Yotian Dissident
Yotian Frontliner
Yotian Tactician
Zephyr Sentinel

Sheet rare_mythic

At rate 2/149 (1.34%)
Argoth, Sanctum of Nature
Titania, Gaea Incarnate
Ashnod, Flesh Mechanist
Autonomous Assembler
Battlefield Forge
Blast Zone
Brotherhood's End
Brushland
Deathbloom Ritualist
Diabolic Intent
Drafna, Founder of Lat-Nam
Fade from History
Fateful Handoff
Fauna Shaman
Feldon, Ronom Excavator
Fortified Beachhead
Gix's Command
Gixian Puppeteer
Gwenna, Eyes of Gaea
Hajar, Loyal Bodyguard
Hall of Tagsin
Harbin, Vanguard Aviator
Hostile Negotiations
Hurkyl's Final Meditation
Hurkyl, Master Wizard
Kayla's Command
Kayla's Reconstruction
Legions to Ashes
Liberator, Urza's Battlethopter
Llanowar Wastes
Loran of the Third Path
Mechanized Warfare
Misery's Shadow
Mishra's Command
Mishra's Foundry
Mishra, Tamer of Mak Fawa
Over the Top
Painful Quandary
Perennial Behemoth
Phyrexian Dragon Engine
Mishra, Lost to Phyrexia
Queen Kayla bin-Kroog
Razorlash Transmogrant
Siege Veteran
Simian Simulacrum
Skystrike Officer
Soul Partition
Steel Seraph
Tawnos, the Toymaker
Teething Wurmlet
Terisian Mindbreaker
The Mightstone and Weakstone
Urza, Planeswalker
The Stasis Coffin
The Stone Brain
The Temporal Anchor
Thran Spider
Titania's Command
Tocasia's Welcome
Tocasia, Dig Site Mentor
Transmogrant's Crown
Tyrant of Kher Ridges
Underground River
Urza's Command
Urza, Prince of Kroog
Visions of Phyrexia
At rate 1/149 (0.67%)
Arcane Proxy
Awaken the Woods
Bladecoil Serpent
Cityscape Leveler
Clay Champion
Draconic Destiny
Gix, Yawgmoth Praetor
In the Trenches
Mishra, Claimed by Gix
Mishra, Lost to Phyrexia
Myrel, Shield of Argive
One with the Multiverse
Phyrexian Fleshgorger
Platoon Dispenser
Portal to Phyrexia
Rootwire Amalgam
Saheeli, Filigree Master
Sarinth Greatwurm
Skitterbeam Battalion
Surge Engine
Teferi, Temporal Pilgrim
Titania, Voice of Gaea
Titania, Gaea Incarnate
Urza's Sylex
Urza, Lord Protector
Urza, Planeswalker

Sheet brr_retro_artifact

At rate 10/441 (2.27%)
Bone Saw
Burnished Hart
Chromatic Star
Elsewhere Flask
Foundry Inspector
Ichor Wellspring
Ivory Tower
Jalum Tome
Liquimetal Coating
Millstone
Mishra's Bauble
Ornithopter
Pristine Talisman
Self-Assembler
Sigil of Valor
Soul-Guide Lantern
Springleaf Drum
Swiftfoot Boots
At rate 5/441 (1.13%)
Adaptive Automaton
Ashnod's Altar
Astral Cornucopia
Blackblade Reforged
Chromatic Lantern
Cloud Key
Defense Grid
Door to Nothingness
Gilded Lotus
Goblin Charbelcher
Howling Mine
Inspiring Statuary
Journeyer's Kite
Keening Stone
Key to the City
Lodestone Golem
Mazemind Tome
Phyrexian Revoker
Precursor Golem
Psychosis Crawler
Quicksilver Amulet
Quietus Spike
Runechanter's Pike
Scrap Trawler
Sculpting Steel
Semblance Anvil
Sword of the Meek
Thorn of Amethyst
Unwinding Clock
Well of Lost Dreams
At rate 5/882 (0.57%)
Aetherflux Reservoir
Altar of Dementia
Caged Sun
Helm of the Host
Mesmeric Orb
Mind's Eye
Mox Amber
Mystic Forge
Perilous Vault
Phyrexian Processor
Platinum Angel
Ramos, Dragon Engine
Staff of Domination
Sundering Titan
Wurmcoil Engine
At rate 2/441 (0.45%)
Bone Saw
Burnished Hart
Chromatic Star
Elsewhere Flask
Foundry Inspector
Ichor Wellspring
Ivory Tower
Jalum Tome
Liquimetal Coating
Millstone
Mishra's Bauble
Ornithopter
Pristine Talisman
Self-Assembler
Sigil of Valor
Soul-Guide Lantern
Springleaf Drum
Swiftfoot Boots
At rate 1/441 (0.23%)
Adaptive Automaton
Ashnod's Altar
Astral Cornucopia
Blackblade Reforged
Chromatic Lantern
Cloud Key
Defense Grid
Door to Nothingness
Gilded Lotus
Goblin Charbelcher
Howling Mine
Inspiring Statuary
Journeyer's Kite
Keening Stone
Key to the City
Lodestone Golem
Mazemind Tome
Phyrexian Revoker
Precursor Golem
Psychosis Crawler
Quicksilver Amulet
Quietus Spike
Runechanter's Pike
Scrap Trawler
Sculpting Steel
Semblance Anvil
Sword of the Meek
Thorn of Amethyst
Unwinding Clock
Well of Lost Dreams
At rate 1/882 (0.11%)
Aetherflux Reservoir
Altar of Dementia
Caged Sun
Helm of the Host
Mesmeric Orb
Mind's Eye
Mox Amber
Mystic Forge
Perilous Vault
Phyrexian Processor
Platinum Angel
Ramos, Dragon Engine
Staff of Domination
Sundering Titan
Wurmcoil Engine