30 cards where the text includes “delve”

Become Immense (Ultimate Masters #157)
Dead Drop (Khans of Tarkir #67)
Death Rattle (Modern Masters #78)
Delver of Secrets // Insectile Aberration (Innistrad: Midnight Hunt #47)
Delver of Secrets // Insectile Aberration (Innistrad: Midnight Hunt #47)
Dig Through Time (Outlaws of Thunder Junction Commander #95)
Empty the Pits (Khans of Tarkir #72y)
Ethereal Forager (Commander 2020 #34)
Gurmag Angler (Ultimate Masters #102)
Hogaak, Arisen Necropolis (Modern Horizons #202)
Hooting Mandrills (Ultimate Masters #170)
Jungle Delver (Game Night #45)
Logic Knot (Time Spiral Remastered #73)
Magmatic Sinkhole (Modern Horizons #135)
Murderous Cut (Khans of Tarkir #81y)
Murktide Regent (Modern Horizons 2 #52)
Necropolis Fiend (Khans of Tarkir #82)
Phyrexian Delver (March of the Machine Commander #263)
Rite of Undoing (Fate Reforged #49)
Set Adrift (Khans of Tarkir #54)
Shambling Attendants (Khans of Tarkir #89y)
Sibsig Muckdraggers (Fate Reforged #83)
Sorcerous Squall (Tales of Middle-earth Commander #504)
Soulflayer (Commander 2020 #138)
Sultai Scavenger (Khans of Tarkir #91)
Tasigur's Cruelty (Fate Reforged #88)
Tasigur, the Golden Fang (Ultimate Masters #117)
Temporal Trespass (Fate Reforged #55)
Tombstalker (Time Spiral Remastered #146)
Treasure Cruise (Outlaws of Thunder Junction Commander #120)
Will of the Naga (Fate Reforged #58)

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