Ravnica Allegiance Seeded Prerelease Booster Gruul has no variants:
Explore this pack in Sealed.

Sheets

Sheet common

At rate 1/33 (3.03%)
Act of Treason
Axebane Beast
Burn Bright
Burning-Tree Vandal
Deface
Feral Maaka
Frenzied Arynx
Ghor-Clan Wrecker
Gift of Strength
Goblin Gathering
Gravel-Hide Goblin
Gruul Guildgate
Gruul Guildgate
Gruul Locket
Mammoth Spider
Open the Gates
Rampaging Rendhorn
Root Snare
Rubble Reading
Rubble Slinger
Rubblebelt Recluse
Rubblebelt Runner
Sagittars' Volley
Saruli Caretaker
Savage Smash
Scorchmark
Spear Spewer
Stony Strength
Storm Strike
Sylvan Brushstrider
Territorial Boar
Titanic Brawl
Wrecking Beast

Sheet uncommon

At rate 1/22 (4.55%)
Biogenic Upgrade
Bolrac-Clan Crusher
Cavalcade of Calamity
Clamor Shaman
Clan Guildmage
Collision
Dagger Caster
Enraged Ceratok
Flames of the Raze-Boar
Gatebreaker Ram
Gates Ablaze
Gruul Beastmaster
Regenesis
Rhythm of the Wild
Rumbling Ruin
Silhana Wayfinder
Smelt-Ward Ignus
Sunder Shaman
Tin Street Dodger
Tower Defense
Wilderness Reclamation
Zhur-Taa Goblin

Sheet promo

At rate 2/19 (10.53%)
Amplifire
Cindervines
End-Raze Forerunners
Gruul Spellbreaker
Guardian Project
Immolation Shaman
Mirror March
Nikya of the Old Ways
Rampage of the Clans
At rate 1/19 (5.26%)
Ravager Wurm