19 cards where the name includes “seal”

Ground Seal (Commander 2018 #149)
Imperial Seal (Double Masters 2022 #79)
Kozilek's Unsealing (Modern Horizons 3 #65)
Patriar's Seal (Commander Legends: Battle for Baldur's Gate #332)
Rune-Sealed Wall (Foundations #49)
Sarkhan's Unsealing (Jumpstart #361)
Seal Away (Dominaria #31)
Sealed Fate (Mirage #282)
Sea Legs (Rivals of Ixalan #50)
Seal from Existence (March of the Machine #35)
Sealock Monster (Duel Decks: Elspeth vs. Kiora #42)
Seal of Cleansing (Murders at Karlov Manor Commander #80)
Seal of Doom (Modern Masters 2017 #83)
Seal of Fire (Duel Decks Anthology: Jace vs. Chandra #50)
Seal of Primordium (Time Spiral Remastered #228)
Seal of Removal (Modern Horizons 2 #269)
Seal of Strength (Eternal Masters #184)
Seal of the Guildpact (Ravnica Remastered #266)
Unseal the Necropolis (March of the Machine #128)

The message was clear to Sorin—time to search for something else.