14 cards where the illustration contains “excavation”

Ancient Excavation (Commander 2016 #27)
Archaeological Dig (Invasion #320)
Argivian Find (Weatherlight #6)
Buried Ruin (Magic 2012 #224)
Buried Treasure (The Lost Caverns of Ixalan #246)
Diligent Excavator (Dominaria #51)
Excavation Explosion (The Brothers' War #132)
Graveyard Trespasser // Graveyard Glutton (Innistrad: Midnight Hunt #104)
Graveyard Trespasser // Graveyard Glutton (Innistrad: Midnight Hunt #104)
Loran, Disciple of History (The Brothers' War #13)
Mine Worker (The Brothers' War #239)
Powerstone Shard (Dominaria #227)
Scavenger Folk (Fifth Edition #323)
Soldevi Excavations (Alliances #143)
Tocasia's Dig Site (The Brothers' War #266)

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