Guilds of Ravnica Seeded Prerelease Booster Boros has no variants:
Explore this pack in Sealed.

Sheets

Sheet common

At rate 1/32 (3.13%)
Barging Sergeant
Blade Instructor
Boros Guildgate
Boros Guildgate
Boros Locket
Candlelight Vigil
Collar the Culprit
Command the Storm
Cosmotronic Wave
Fearless Halberdier
Fire Urchin
Fresh-Faced Recruit
Garrison Sergeant
Goblin Locksmith
Hammer Dropper
Healer's Hawk
Hunted Witness
Intrusive Packbeast
Luminous Bonds
Maniacal Rage
Ornery Goblin
Parhelion Patrol
Righteous Blow
Rubblebelt Boar
Skyknight Legionnaire
Skyline Scout
Sure Strike
Sworn Companions
Take Heart
Tenth District Guard
Torch Courier
Wojek Bodyguard

Sheet uncommon

At rate 1/22 (4.55%)
Book Devourer
Boros Challenger
Crush Contraband
Demotion
Electrostatic Field
Gird for Battle
Goblin Banneret
Goblin Cratermaker
Haazda Marshal
Hellkite Whelp
Inescapable Blaze
Inspiring Unicorn
Integrity
Justice Strike
Lava Coil
Legion Guildmage
Roc Charger
Smelt-Ward Minotaur
Street Riot
Sunhome Stalwart
Swathcutter Giant
Truefire Captain

Sheet promo

At rate 2/19 (10.53%)
Citywide Bust
Dawn of Hope
Deafening Clarion
Legion Warboss
Light of the Legion
Response
Runaway Steam-Kin
Swiftblade Vindicator
Tajic, Legion's Edge
At rate 1/19 (5.26%)
Aurelia, Exemplar of Justice