Strixhaven: School of Mages Seeded Prerelease Booster Silverquill has no variants:
Explore this pack in Sealed.

Sheets

Sheet common

At rate 1/30 (3.33%)
Ageless Guardian
Arrogant Poet
Beaming Defiance
Combat Professor
Crushing Disappointment
Defend the Campus
Eager First-Year
Essence Infusion
Exhilarating Elocution
Expel
Guiding Voice
Inkling Summoning
Lash of Malice
Leech Fanatic
Mage Hunters' Onslaught
Novice Dissector
Owlin Shieldmage
Pilgrim of the Ages
Pillardrop Rescuer
Professor's Warning
Promising Duskmage
Rise of Extus
Silverquill Campus
Silverquill Pledgemage
Specter of the Fens
Spiteful Squad
Star Pupil
Stonerise Spirit
Study Break
Unwilling Ingredient

Sheet uncommon

At rate 1/23 (4.35%)
Brackish Trudge
Clever Lumimancer
Closing Statement
Detention Vortex
Dueling Coach
Eyetwitch
Flunk
Fracture
Go Blank
Humiliate
Killian, Ink Duelist
Mage Hunter
Necrotic Fumes
Plumb the Forbidden
Professor of Symbology
Secret Rendezvous
Shadewing Laureate
Show of Confidence
Silverquill Apprentice
Stonebinder's Familiar
Tenured Inkcaster
Thunderous Orator
Umbral Juke

Sheet rare_mythic

At rate 1/20 (5.0%)
Academic Probation
Baleful Mastery
Confront the Past
Devastating Mastery
Dramatic Finale
Elite Spellbinder
Leonin Lightscribe
Oriq Loremage
Poet's Quill
Selfless Glyphweaver
Deadly Vanity
Semester's End
Shaile, Dean of Radiance
Embrose, Dean of Shadow
Shineshadow Snarl
Silverquill Command
Silverquill Silencer
Sparring Regimen
Strict Proctor
Vanishing Verse
At rate 1/40 (2.5%)
Blot Out the Sky
Mavinda, Students' Advocate
Professor Onyx
Shadrix Silverquill

Sheet prerelease_promo

At rate 2/159 (1.26%)
Academic Probation
Accomplished Alchemist
Archmage Emeritus
Augmenter Pugilist
Echoing Equation
Baleful Mastery
Basic Conjuration
Blade Historian
Callous Bloodmage
Codie, Vociferous Codex
Confront the Past
Conspiracy Theorist
Culling Ritual
Culmination of Studies
Daemogoth Titan
Devastating Mastery
Double Major
Draconic Intervention
Dragonsguard Elite
Dramatic Finale
Dream Strix
Efreet Flamepainter
Elemental Expressionist
Elite Spellbinder
Exponential Growth
Fervent Mastery
Flamescroll Celebrant
Revel in Silence
Frostboil Snarl
Furycalm Snarl
Gnarled Professor
Hall of Oracles
Illuminate History
Ingenious Mastery
Kianne, Dean of Substance
Imbraham, Dean of Theory
Leonin Lightscribe
Lorehold Command
Manifestation Sage
Multiple Choice
Necroblossom Snarl
Oriq Loremage
Pestilent Cauldron
Restorative Burst
Plargg, Dean of Chaos
Augusta, Dean of Order
Poet's Quill
Prismari Command
Quandrix Command
Radiant Scrollwielder
Retriever Phoenix
Rushed Rebirth
Sedgemoor Witch
Selfless Glyphweaver
Deadly Vanity
Semester's End
Shaile, Dean of Radiance
Embrose, Dean of Shadow
Shineshadow Snarl
Silverquill Command
Silverquill Silencer
Sparring Regimen
Strict Proctor
Strixhaven Stadium
Teachings of the Archaics
Tempted by the Oriq
The Biblioplex
Torrent Sculptor
Flamethrower Sonata
Uvilda, Dean of Perfection
Nassari, Dean of Expression
Valentin, Dean of the Vein
Lisette, Dean of the Root
Vanishing Verse
Venerable Warsinger
Verdant Mastery
Vineglimmer Snarl
Wandering Archaic
Explore the Vastlands
Witherbloom Command
At rate 1/159 (0.63%)
Beledros Witherbloom
Blex, Vexing Pest
Search for Blex
Blot Out the Sky
Body of Research
Crackle with Power
Ecological Appreciation
Extus, Oriq Overlord
Awaken the Blood Avatar
Galazeth Prismari
Harness Infinity
Hofri Ghostforge
Jadzi, Oracle of Arcavios
Journey to the Oracle
Kasmina, Enigma Sage
Magma Opus
Mascot Exhibition
Mavinda, Students' Advocate
Mila, Crafty Companion
Lukka, Wayward Bonder
Professor Onyx
Rowan, Scholar of Sparks
Will, Scholar of Frost
Shadrix Silverquill
Tanazir Quandrix
Velomachus Lorehold