48 cards where the cards aren’t reprints and the card is tagged “gains-double-strike”

Needle Spires (Oath of the Gatewatch #175)
Balan, Wandering Knight (Commander 2017 #2)
Silverblade Paladin (Avacyn Restored #36)
Celebr-8000 (Unfinity #185)
Knighted Myr (Modern Horizons 2 #17)
Cairn Wanderer (Lorwyn #105)
Urborg Scavengers (March of the Machine: The Aftermath #15)
Majestic Myriarch (Hour of Devastation #122)
Indominus Rex, Alpha (Jurassic World Collection #14)
Twinblade Paladin (Core Set 2020 #285)
Altar of the Wretched // Wretched Bonemass (The Lost Caverns of Ixalan Commander #10)
Altar of the Wretched // Wretched Bonemass (The Lost Caverns of Ixalan Commander #10)
Boros Keyrune (Gatecrash #227)
Two-Headed Giant (Dominaria #147)
Picnic Ruiner // Stolen Goodies (Wilds of Eldraine #232)
Glorious Enforcer (Modern Horizons 2 #14)
Chandra's Pyreling (Core Set 2021 #138)
Apostle of Invasion (Phyrexia: All Will Be One #3)
Thunderous Orator (Strixhaven: School of Mages #35)
Storm Fleet Swashbuckler (Rivals of Ixalan #117)
Rayami, First of the Fallen (Commander 2019 #48)
Soulflayer (Fate Reforged #84)
Kor Duelist (Zendikar #19)
Ragefire Hellkite (Dominaria United #285)
Jodah's Avenger (Planar Chaos #42)
Momentum Rumbler (Ikoria: Lair of Behemoths #126)
Scourge Wolf (Shadows over Innistrad #179)
Rakdos Pit Dragon (Dissension #69)
Gloom Stalker (Adventures in the Forgotten Realms #16)
Auriok Edgewright (Scars of Mirrodin #3)
Garrison Sergeant (Guilds of Ravnica #172)
Favored of Iroas (Theros Beyond Death #15)
Scuttling Butler (Streets of New Capenna #244)
Spelleater Wolverine (Ikoria: Lair of Behemoths #137)
Spinehorn Minotaur (Modern Horizons #147)
Gallant Pie-Wielder (Wilds of Eldraine #15)
Ordruun Veteran (Gatecrash #184)
Cabaretti Initiate (Streets of New Capenna #137)
Imperial Lancer (Ixalan #15)
Fallaji Chaindancer (The Brothers' War #134)
Death-Mask Duplicant (Darksteel #115)
Spiraling Duelist (Mirrodin Besieged #76)
Omenport Vigilante (Outlaws of Thunder Junction #21)
Animus of Predation (Conspiracy: Take the Crown #60)
Atinlay Igpay (Unhinged #1)
Border Guardian (Unstable #140)
Greater Morphling (Unhinged #34)
Priest of Possibility (Alchemy: Dominaria #2)
Sproutwatch Dryad (Alchemy: Murders at Karlov Manor #20)

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