17 cards where the cards are land-bouncing duals

Arid Archway (Outlaws of Thunder Junction #252)
Azorius Chancery (Duskmourn: House of Horror Commander #261)
Boros Garrison (Ravnica: Clue Edition #231)
Coral Atoll (Commander Legends #480)
Dimir Aqueduct (Duskmourn: House of Horror Commander #270)
Dormant Volcano (Commander Anthology Volume II #246)
Everglades (Commander 2014 #294)
Golgari Rot Farm (Duskmourn: House of Horror Commander #279)
Gruul Turf (Ravnica: Clue Edition #238)
Guildless Commons (Commander Masters #1003)
Izzet Boilerworks (Outlaws of Thunder Junction Commander #302)
Jungle Basin (Commander Legends #484)
Karoo (Commander 2014 #303)
Orzhov Basilica (Duskmourn: House of Horror Commander #292)
Rakdos Carnarium (Ravnica: Clue Edition #243)
Selesnya Sanctuary (Ravnica: Clue Edition #246)
Simic Growth Chamber (Duskmourn: House of Horror Commander #298)

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