26 cards where the name includes “sphere” and the color identity ≤ BGW

Aethersphere Harvester (Aether Revolt #142)
Armillary Sphere (Commander Legends #298)
Chimeric Sphere (Weatherlight #148)
Chromatic Sphere (Jumpstart #462)
Commander's Sphere (The Lost Caverns of Ixalan Commander #301)
Damping Sphere (Dominaria Remastered #219)
Dark Sphere (The Dark #100)
Expand the Sphere (Phyrexia: All Will Be One #168)
First-Sphere Gargantua (March of the Machine Commander #248)
Glistening Sphere (Phyrexia: All Will Be One Commander #20)
Myr Battlesphere (March of the Machine Commander #366)
Protective Sphere (Invasion #26)
Shield Sphere (Masters Edition #166)
Sphere of Annihilation (Adventures in the Forgotten Realms #121)
Sphere of Duty (Odyssey #48)
Sphere of Grace (Odyssey #49)
Sphere of Law (Odyssey #50)
Sphere of Purity (Mirrodin #26)
Sphere of Reason (Odyssey #51)
Sphere of Resistance (Vintage Masters #284)
Sphere of Safety (Commander 2016 #77)
Sphere of the Suns (Modern Masters 2015 #231)
Sphere of Truth (Odyssey #52)
Trinisphere (Double Masters #303)
Vibrating Sphere (Masters Edition IV #238)
Wooden Sphere (Eighth Edition #321)

In the blink of an eye, they strode from deep snow to the end of this search.