Ravnica Allegiance Theme Booster Simic has variants:
Explore this pack in Sealed.

Sheets

Sheet uncommon (duplicates allowed)

At rate 1/23 (4.35%)
Biogenic Upgrade
Combine Guildmage
Enraged Ceratok
Essence Capture
Eyes Everywhere
Frilled Mystic
Galloping Lizrog
Gatebreaker Ram
Gateway Sneak
Gyre Engineer
Incubation
Pteramander
Regenesis
Sharktocrab
Silhana Wayfinder
Skatewing Spy
Swirling Torrent
Tower Defense
Trollbred Guardian
Wall of Lost Thoughts
Wilderness Reclamation
Windstorm Drake
At rate 1/92 (1.09%)
Gate Colossus
Junktroller
Scrabbling Claws
Screaming Shield

Sheet common (duplicates allowed)

At rate 4/133 (3.01%)
Aeromunculus
Applied Biomancy
Axebane Beast
Chillbringer
Clear the Mind
Coral Commando
Faerie Duelist
Gift of Strength
Growth Spiral
Humongulus
Mammoth Spider
Open the Gates
Persistent Petitioners
Prying Eyes
Quench
Root Snare
Sage's Row Savant
Sagittars' Volley
Saruli Caretaker
Sauroform Hybrid
Scuttlegator
Shimmer of Possibility
Simic Guildgate
Simic Guildgate
Simic Locket
Skitter Eel
Slimebind
Steeple Creeper
Stony Strength
Sylvan Brushstrider
Territorial Boar
Thought Collapse
Titanic Brawl
At rate 1/133 (0.75%)
Gateway Plaza

Sheet rare_mythic

At rate 4/63 (6.35%)
Benthic Biomancer
Biomancer's Familiar
Breeding Pool
End-Raze Forerunners
Growth-Chamber Guardian
Guardian Project
Incubation Druid
Mass Manipulation
Repudiate
Simic Ascendancy
Sphinx of Foresight
Verity Circle
Zegana, Utopian Speaker
At rate 2/63 (3.17%)
Biogenic Ooze
Hydroid Krasis
Mesmerizing Benthid
Prime Speaker Vannifar
At rate 1/63 (1.59%)
Glass of the Guildpact
Plaza of Harmony
Tome of the Guildpact