Arcane Sanctum has 22 printings.
Star Trek Commander
The List
Final Fantasy Commander
Aetherdrift Commander
Duskmourn: House of Horror Commander
March of the Machine Commander
The Brothers' War Commander
Warhammer 40,000 Commander
Dominaria United Commander
New Capenna Commander
Forgotten Realms Commander
Commander 2018
Commander Anthology Volume II
Commander 2017
Modern Masters 2017
Commander 2016
Legendary Cube Prize Pack
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Not in any deck, booster, or product we know of
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134
Commander 2013
Shards of Alara
View gallery of all printings