Gatecrash Prerelease Pack Boros has no variants:
Explore this pack in Sealed.

Sheets

Sheet common

At rate 1/34 (2.94%)
Act of Treason
Aerial Maneuver
Angelic Edict
Armored Transport
Assault Griffin
Bomber Corps
Boros Guildgate
Court Street Denizen
Daring Skyjek
Ember Beast
Foundry Street Denizen
Furious Resistance
Guildscorn Ward
Knight Watch
Madcap Skills
Martial Glory
Massive Raid
Millennial Gargoyle
Mugging
Nav Squad Commandos
Prophetic Prism
Razortip Whip
Riot Gear
Shattering Blow
Shielded Passage
Skyblinder Staff
Skyknight Legionnaire
Smite
Structural Collapse
Tin Street Market
Towering Thunderfist
Warmind Infantry
Wojek Halberdiers
Zarichi Tiger

Sheet uncommon

At rate 1/23 (4.35%)
Arrows of Justice
Boros Charm
Boros Elite
Boros Keyrune
Cinder Elemental
Crackling Perimeter
Debtor's Pulpit
Firefist Striker
Fortress Cyclops
Guardian of the Gateless
Hellraiser Goblin
Hold the Gates
Holy Mantle
Homing Lightning
Mark for Death
Murder Investigation
Ordruun Veteran
Righteous Charge
Ripscale Predator
Skullcrack
Sunhome Guildmage
Truefire Paladin
Urbis Protector

Sheet rare_mythic

At rate 2/31 (6.45%)
Angelic Skirmisher
Assemble the Legion
Boros Reckoner
Firemane Avenger
Five-Alarm Fire
Foundry Champion
Frontline Medic
Glaring Spotlight
Illusionist's Bracers
Legion Loyalist
Luminate Primordial
Molten Primordial
Sacred Foundry
Spark Trooper
Thespian's Stage
At rate 1/31 (3.23%)
Aurelia, the Warleader