38 cards where (the text includes “loses” and the text includes “abilities”) and (the card is available on Arena)

Accident-Prone Apprentice // Amphibian Accident (Alchemy: Wilds of Eldraine #16)
Barrow-Blade (The Lord of the Rings: Tales of Middle-earth #237)
Bronzehide Lion (Theros Beyond Death #210)
Chromium, the Mutable (Core Set 2019 #214)
Deep Freeze (Dominaria #50)
Eaten by Piranhas (The Lost Caverns of Ixalan #54)
Frogify (Throne of Eldraine #47)
Heliod's Punishment (Theros Beyond Death #21)
Ichthyomorphosis (Theros Beyond Death #51)
Imprisoned in the Moon (Shadows over Innistrad Remastered #74)
Invasion of Muraganda // Primordial Plasm (March of the Machine #192)
Invasion of Muraganda // Primordial Plasm (March of the Machine #192)
Kaito, Dancing Shadow (Phyrexia: All Will Be One #204)
Kasmina's Transmutation (War of the Spark #57)
Kenrith's Transformation (Throne of Eldraine #164)
Lithoform Blight (Zendikar Rising #109)
Mercurial Transformation (Strixhaven: School of Mages #47)
Merfolk Trickster (Dominaria #56)
Minimus Containment (Adventures in the Forgotten Realms #24)
Monument to Perfection (Phyrexia: All Will Be One #233)
Mystic Subdual (Ikoria: Lair of Behemoths #57)
Nicol Bolas, Dragon-God (War of the Spark #207)
Nullhide Ferox (Guilds of Ravnica #138)
Oko, Thief of Crowns (Throne of Eldraine #197)
Opportunistic Dragon (Throne of Eldraine #133)
Patriar's Humiliation (Alchemy Horizons: Baldur's Gate #25)
Ray of Frost (Adventures in the Forgotten Realms #68)
Reprobation (Jumpstart: Historic Horizons #116)
Resolute Rejection (Alchemy: Outlaws of Thunder Junction #2)
Spark Rupture (March of the Machine: The Aftermath #5)
Stasis Field (March of the Machine #79)
Stop Cold (Outlaws of Thunder Junction #72)
Tamiyo's Compleation (Kamigawa: Neon Dynasty #83)
The Irencrag (Wilds of Eldraine #248)
Tishana's Tidebinder (The Lost Caverns of Ixalan #81)
Town-Razer Tyrant (Alchemy: Innistrad #45)
Vraska, Betrayal's Sting (Phyrexia: All Will Be One #115)
Warkite Marauder (Rivals of Ixalan #60)
Witness Protection (Streets of New Capenna #66)

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