14 cards where the text includes “storage counter” and it’s legal in Commander and the color identity ≤ BGUW

Crucible of the Spirit Dragon (Forgotten Realms Commander #231)
Mage-Ring Network (Commander Masters #1009)
Dreadship Reef (Time Spiral Remastered #276)
Saltcrusted Steppe (Time Spiral Remastered #283)
Calciform Pools (Time Spiral Remastered #275)
Bottomless Vault (Fifth Edition #411)
Saprazzan Cove (Mercadian Masques #327)
City of Shadows (Masters Edition III #206)
Sand Silos (Fifth Edition #423)
Rushwood Grove (Mercadian Masques #325)
Hollow Trees (Fifth Edition #418)
Subterranean Hangar (Mercadian Masques #329)
Icatian Store (Fifth Edition #419)
Fountain of Cho (Mercadian Masques #317)

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