47 cards where the illustration contains “indoor”

Abduction (Weatherlight #30)
Alms (Weatherlight #3)
Ancestral Knowledge (Weatherlight #32)
Arcane Laboratory (Urza's Saga #60)
Audience with Trostani (Murders at Karlov Manor #309)
Azorius Chancery (Dissension #170)
Bile Blight (Friday Night Magic 2014 #8)
Boarded Window (Innistrad: Crimson Vow #253)
Catalog (Urza's Saga #64)
Commander's Plate (Commander Legends #692)
Confiscate (Urza's Saga #66)
Crypt Lurker (Core Set 2021 #93)
Darkwater Catacombs (Forgotten Realms Commander #232)
Diabolic Servitude (Urza's Saga #130)
Etrata, Deadly Fugitive (Murders at Karlov Manor #200)
Gerrard's Wisdom (Weatherlight #15)
Head Games (Onslaught #155)
Healing Salve (Urza's Saga #16)
Heirloom Mirror // Inherited Fiend (Innistrad: Midnight Hunt #105)
Heirloom Mirror // Inherited Fiend (Innistrad: Midnight Hunt #105)
Hermetic Study (Urza's Saga #78)
Hired Torturer (Dragon's Maze #25)
Inner Sanctum (Weatherlight #18)
Insufferable Balladeer (Commander Legends: Battle for Baldur's Gate #184)
Jetmir, Nexus of Revels (Streets of New Capenna #193)
Lavinia of the Tenth (Dragon's Maze #80)
Netherese Puzzle-Ward (Forgotten Realms Commander #17)
Opal Acrolith (Urza's Saga #22)
Opal Titan (Urza's Saga #26)
Orzhov Basilica (Guildpact #161)
Private Research (Urza's Destiny #41)
Quash (Urza's Destiny #42)
Recantation (Urza's Saga #91)
Rune of Protection: Artifacts (Urza's Saga #35)
Rune of Protection: Red (Urza's Saga #40)
Rune of Protection: White (Urza's Saga #41)
Sanctum Custodian (Urza's Saga #42)
Sanctum Guardian (Urza's Saga #43)
Serra's Embrace (Urza's Saga #47)
Serra's Hymn (Urza's Saga #48)
Serra's Liturgy (Urza's Saga #49)
Show and Tell (Urza's Saga #96)
Simic Growth Chamber (Dissension #180)
Stern Proctor (Urza's Saga #99)
Stroke of Genius (Judge Gift Cards 1998 #2)
Tenured Oilcaster (March of the Machine #126)
Torment (Stronghold #73)
Veiled Crocodile (Urza's Saga #108)

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