26 cards where the illustration contains “extra-finger”

Bastion Inventor (Aether Revolt #30)
Ceremonious Rejection (Kaladesh #40)
Consul's Shieldguard (Kaladesh #11)
Dispersal Technician (Aether Revolt #32)
Dovin, Architect of Law (Ravnica Allegiance #265)
Dovin Baan (Kaladesh #179)
Dovin, Hand of Control (War of the Spark #229)
Dovin, Hand of Control (Secret Lair Drop #529)
Dovin, Hand of Control (War of the Spark #229★)
Dovin's Acuity (Ravnica Allegiance #168)
Dovin's Veto (War of the Spark Promos #193)
Emergency Powers (Ravnica Allegiance #169)
Empyreal Voyager (Kaladesh #180)
Fabrication Module (Kaladesh #211)
Failed Inspection (Kaladesh #47)
Kessig Forgemaster // Flameheart Werewolf (Shadows over Innistrad #169)
Kessig Forgemaster // Flameheart Werewolf (Shadows over Innistrad #169)
Mind's Eye (Kaladesh Inventions #18)
Minister of Inquiries (Kaladesh #57)
Negate (Aether Revolt #40)
Nimble Innovator (Kaladesh #58)
Padeem, Consul of Innovation (Kaladesh #59)
Shrewd Negotiation (Kaladesh #64)
Vedalken Blademaster (Kaladesh #68)
Warrant // Warden (Ravnica Allegiance #230)
Whirler Virtuoso (Kaladesh #190)
Young Necromancer (Modern Horizons 2 #110)

This search is finished. Now the real work can begin.