28 cards where the card is tagged “counterspell-instant”

Avoid Fate (Time Spiral Timeshifted #73)
Bant Charm (Double Masters 2022 #181)
Burnout (Masters Edition II #121)
Cursecatcher (Masters 25 #53)
Dispel (Battle for Zendikar #76)
Disrupt (Invasion #51)
Flash Counter (Eighth Edition #78)
Flusterstorm (Iconic Masters #55)
Guttural Response (Duel Decks: Mind vs. Might #56)
In the Eye of Chaos (Masters Edition IV #51)
Jin-Gitaxias, Progress Tyrant (Kamigawa: Neon Dynasty #59)
Judge's Familiar (Ravnica Remastered #192)
Mausoleum Wanderer (Eldritch Moon #69)
Miscast (Core Set 2021 #57)
Molten Influence (Odyssey #207)
Muddle the Mixture (Ravnica Remastered #50)
Obscura Charm (Streets of New Capenna #208)
Odds // Ends (Dissension #153)
Psychic Rebuttal (Magic Origins #67)
Quash (Betrayers of Kamigawa #47)
Ring of Immortals (Legends #293)
Sister of Silence (Warhammer 40,000 Commander #26)
Spellshift (Planar Chaos #47)
Split Decision (Conspiracy #25)
Stratus Dancer (Commander 2019 #96)
Swan Song (Commander 2016 #98)
Test of Talents (Strixhaven: School of Mages #59)
Unyaro Griffin (Classic Sixth Edition #49)

Though this query has ended, its relics still slumber in New Argive.