Fate Reforged Seeded Prerelease Booster Mardu has no variants:
Explore this pack in Sealed.

Sheets

Sheet common

At rate 1/20 (5.0%)
Alesha's Vanguard
Ancestral Vengeance
Bathe in Dragonfire
Collateral Damage
Defiant Ogre
Douse in Gloom
Fierce Invocation
Goblin Heelcutter
Gore Swine
Great-Horn Krushok
Harsh Sustenance
Hooded Assassin
Mardu Runemark
Mardu Scout
Pressure Point
Reach of Shadows
Sandblast
Sandsteppe Outcast
Soul Summons
War Flare

Sheet uncommon

At rate 1/18 (5.56%)
Battle Brawler
Break Through the Line
Channel Harm
Dark Deal
Diplomacy of the Wastes
Dragonrage
Fearsome Awakening
Friendly Fire
Grave Strength
Lightform
Mardu Shadowspear
Mardu Woe-Reaper
Orc Sureshot
Pyrotechnics
Rageform
Sage's Reverie
Valorous Stance
Vaultbreaker

Sheet promo

At rate 2/13 (15.38%)
Alesha, Who Smiles at Death
Arcbond
Flamerush Rider
Mardu Strike Leader
Mastery of the Unseen
Rally the Ancestors
At rate 1/13 (7.69%)
Brutal Hordechief