44 cards where the text includes “thopter” and the color identity ≤ RU and (the card is available on Paper)

Access Denied (Neon Dynasty Commander #11)
Aspiring Aeronaut (Magic Origins #46)
Aviation Pioneer (Core Set 2019 #46)
Breya's Apprentice (Modern Horizons 2 #117)
Detective's Satchel (Murders at Karlov Manor #196)
Efficient Construction (Commander Masters #88)
Etherium Spinner (Modern Horizons 2 #40)
Experimental Aviator (Kaladesh #46)
Filigree Crawler (Aether Revolt #150)
Flowstone Thopter (Nemesis #132)
Foundry of the Consuls (Commander 2018 #248)
Gadget Technician (Murders at Karlov Manor #204)
Ghirapur Gearcrafter (Duel Decks: Elves vs. Inventors #46)
Hangarback Walker (Commander Masters #951)
Harried Dronesmith (Murders at Karlov Manor #131)
Inspired Sphinx (Kaldheim Commander #40)
Intrude on the Mind (Murders at Karlov Manor #61)
Invasion of Kaladesh // Aetherwing, Golden-Scale Flagship (March of the Machine #234)
Invasion of Kaladesh // Aetherwing, Golden-Scale Flagship (March of the Machine #234)
Launch Mishap (Jumpstart 2022 #14)
Leonardo da Vinci (Assassin's Creed #20)
Liberator, Urza's Battlethopter (The Brothers' War #237)
Loyal Apprentice (Commander Masters #240)
Maverick Thopterist (Commander 2018 #185)
Pia and Kiran Nalaar (March of the Machine Commander #288)
Pia Nalaar (Commander 2021 #177)
Retrofitter Foundry (Commander 2018 #57)
Roterothopter (Homelands #109)
Saheeli, Filigree Master (The Brothers' War #219)
Sai, Master Thopterist (Commander Masters #118)
Sharding Sphinx (March of the Machine Commander #235)
Spotter Thopter (The Brothers' War #80)
Surveillance Monitor (Murders at Karlov Manor #73)
Sweep the Skies (Modern Horizons 2 #70)
Telethopter (Tempest #311)
Tezzeret, Artifice Master (Core Set 2019 #79)
Thopter Assembly (March of the Machine Commander #386)
Thopter Engineer (Commander 2021 #181)
Thopter Mechanic (The Brothers' War #68)
Thopter Spy Network (March of the Machine Commander #241)
Thopter Squadron (Exodus #140)
Whirlermaker (Kaladesh #239)
Whirler Rogue (Outlaws of Thunder Junction Commander #122)
Whirler Virtuoso (Kaladesh #190)
Yotia Declares War (Dominaria United #153)

The arc of my blade has carved a path of light to the end of these results.