45 cards where the text includes “counter” and the card types include “instant” and the colors is U and the mana cost is greater than or equal to {U} and the mana value = 1 and it’s legal in Legacy

Abjure (Weatherlight #31)
Annul (Kaldheim #42)
An Offer You Can't Refuse (Streets of New Capenna #51)
Blue Elemental Blast (Masters 25 #43)
Broken Ambitions (Lorwyn #54)
Ceremonious Rejection (Kaladesh #40)
Clash of Wills (Magic Origins #49)
Clockspinning (Time Spiral #53)
Concerted Defense (Zendikar Rising #52)
Condescend (Iconic Masters #46)
Consign to Memory (Modern Horizons 3 #54)
Dispel (Battle for Zendikar #76)
Disrupt (Invasion #51)
Envelop (Judgment #39)
Ertai's Meddling (Tempest #61)
Ertai's Trickery (Planeshift #24)
Essence Flux (Jumpstart #151)
Flusterstorm (Iconic Masters #55)
Force Spike (Duel Decks: Izzet vs. Golgari #14)
Glyph of Delusion (Legends #60)
Hydroblast (Eternal Masters #55)
Intervene (Urza's Legacy #33)
Invasive Surgery (Shadows over Innistrad #68)
Minor Misstep (Phyrexia: All Will Be One #64)
Miscast (Core Set 2021 #57)
Nix (Future Sight #55)
Outwit (Avacyn Restored #70)
Phantom Interference (Outlaws of Thunder Junction #61)
Power Sink (Vintage Masters #88)
Slip Out the Back (Ravnica: Clue Edition #99)
Spell Blast (Tempest Remastered #69)
Spell Burst (Time Spiral Remastered #88)
Spell Pierce (Double Masters 2022 #63)
Spell Snare (Battlebond #132)
Steel Sabotage (Double Masters #70)
Stern Scolding (The Lord of the Rings: Tales of Middle-earth #71)
Stifle (Conspiracy #108)
Strix Serenade (Modern Horizons 3 #71)
Stubborn Denial (Khans of Tarkir #56)
Suspend (Modern Horizons 2 #68)
Swan Song (Commander 2016 #98)
Syncopate (Innistrad: Crimson Vow #83)
Three Steps Ahead (Outlaws of Thunder Junction #75)
Turn Aside (Eldritch Moon #78)
Wash Away (Innistrad: Crimson Vow #87)

This search is finished. Now the real work can begin.