16 cards where the name is exactly “arcane sanctum”

Arcane Sanctum (March of the Machine Commander #390)
Arcane Sanctum (The Brothers' War Commander #173)
Arcane Sanctum (Warhammer 40,000 Commander #264★)
Arcane Sanctum (Warhammer 40,000 Commander #264)
Arcane Sanctum (Dominaria United Commander #196)
Arcane Sanctum (New Capenna Commander #385)
Arcane Sanctum (Forgotten Realms Commander #223)
Arcane Sanctum (The List #C18-232)
Arcane Sanctum (Commander 2018 #232)
Arcane Sanctum (Commander Anthology Volume II #234)
Arcane Sanctum (Commander 2017 #234)
Arcane Sanctum (Modern Masters 2017 #228)
Arcane Sanctum (Commander 2016 #281)
Arcane Sanctum (Legendary Cube Prize Pack #134)
Arcane Sanctum (Commander 2013 #273)
Arcane Sanctum (Shards of Alara #220)

The message was clear to Sorin—time to search for something else.