29 cards where the text includes “flying” and the set is “bro”

Aeronaut Cavalry (The Brothers' War #1)
Airlift Chaplain (The Brothers' War #2)
Ambush Paratrooper (The Brothers' War #3)
Thopter Architect (The Brothers' War #29)
Steel Seraph (The Brothers' War #38)
Air Marshal (The Brothers' War #43)
Koilos Roc (The Brothers' War #55)
Skystrike Officer (The Brothers' War #62)
Take Flight (The Brothers' War #65)
Thopter Mechanic (The Brothers' War #68)
Wing Commando (The Brothers' War #73)
Zephyr Sentinel (The Brothers' War #74)
Spotter Thopter (The Brothers' War #80)
Carrion Locust (The Brothers' War #87)
Gurgling Anointer (The Brothers' War #104)
Kill-Zone Acrobat (The Brothers' War #106)
Draconic Destiny (The Brothers' War #130)
Tyrant of Kher Ridges (The Brothers' War #154)
Fallaji Dragon Engine (The Brothers' War #159)
Shoot Down (The Brothers' War #190)
Harbin, Vanguard Aviator (The Brothers' War #212)
Saheeli, Filigree Master (The Brothers' War #219)
Aeronaut's Wings (The Brothers' War #231)
Argivian Avenger (The Brothers' War #232)
Levitating Statue (The Brothers' War #236)
Liberator, Urza's Battlethopter (The Brothers' War #237)
Reconstructed Thopter (The Brothers' War #242)
Swiftgear Drake (The Brothers' War #251)
Artificer's Dragon (The Brothers' War #291)

It is the moment of discovery, the triumph of the mind, and the end of these results.