58 cards where the card was in “a25” and it’s not legal in Modern

Accumulated Knowledge (Masters 25 #40)
Akroma's Vengeance (Commander 2020 #74)
Ancient Craving (Crimson Vow Commander #117)
Animar, Soul of Elements (Double Masters 2022 #171)
Arcane Denial (Outlaws of Thunder Junction Commander #89)
Armageddon (Masters 25 #5)
Ash Barrens (Murders at Karlov Manor Commander #248)
Balduvian Horde (Masters 25 #120)
Blue Elemental Blast (Masters 25 #43)
Borrowing 100,000 Arrows (Masters 25 #45)
Brainstorm (Murders at Karlov Manor Commander #96)
Broodhatch Nantuko (Murders at Karlov Manor Commander #167)
Chartooth Cougar (Masters 25 #125)
Cinder Storm (Masters 25 #126)
Dark Ritual (Masters 25 #82)
Deadly Designs (Masters 25 #83)
Death's-Head Buzzard (Masters 25 #84)
Decree of Justice (Commander 2020 #85)
Dirge of Dread (Masters 25 #86)
Doomsday (Masters 25 #88)
Elvish Aberration (Dominaria Remastered #156)
Erg Raiders (Masters 25 #90)
Flash (Masters 25 #57)
Goblin War Drums (Masters 25 #133)
Grenzo, Dungeon Warden (Masters 25 #205)
Hanna, Ship's Navigator (Commander Masters #340)
Ihsan's Shade (Masters 25 #94)
Invigorate (Double Masters #172)
Izzet Chemister (Commander Legends: Battle for Baldur's Gate #798)
Jackal Pup (Masters 25 #139)
Karona's Zealot (Masters 25 #18)
Kindle (Masters 25 #140)
Kongming, "Sleeping Dragon" (Masters 25 #20)
Krosan Colossus (Murders at Karlov Manor Commander #176)
Laquatus's Champion (Masters 25 #95)
Living Death (Commander Anthology Volume II #68)
Living Wish (Masters 25 #179)
Lull (Dominaria Remastered #169)
Magus of the Wheel (Commander Masters #241)
Mesmeric Fiend (Masters 25 #97)
Myriad Landscape (Murders at Karlov Manor Commander #276)
Noble Templar (Masters 25 #25)
Path of Peace (Masters 25 #29)
Pernicious Deed (Masters 25 #212)
Phyrexian Ghoul (March of the Machine Commander #264)
Prossh, Skyraider of Kher (Masters 25 #214)
Quicksilver Dagger (Dominaria Remastered #195)
Red Elemental Blast (Masters 25 #147)
Reef Worm (Commander 2021 #127)
Rishadan Port (Masters 25 #246)
Sai of the Shinobi (Masters 25 #230)
Shoreline Ranger (Masters 25 #72)
Simian Spirit Guide (Time Spiral Remastered #190)
Skirk Commando (Masters 25 #150)
Stampede Driver (Masters 25 #188)
Stangg (Masters 25 #218)
Swords to Plowshares (Murders at Karlov Manor Commander #88)
Undead Gladiator (Dominaria Remastered #105)

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