30 cards where the text includes “transform” and the card types include “land” and (the card is available on Paper) and (the set is “lci” or the set is “rix” or the set is “xln”)

Aclazotz, Deepest Betrayal // Temple of the Dead (The Lost Caverns of Ixalan #88)
Aclazotz, Deepest Betrayal // Temple of the Dead (The Lost Caverns of Ixalan #88)
Arguel's Blood Fast // Temple of Aclazotz (Ixalan #90)
Arguel's Blood Fast // Temple of Aclazotz (Ixalan #90)
Azor's Gateway // Sanctum of the Sun (Rivals of Ixalan #176)
Azor's Gateway // Sanctum of the Sun (Rivals of Ixalan #176)
Brass's Tunnel-Grinder // Tecutlan, the Searing Rift (The Lost Caverns of Ixalan #135)
Brass's Tunnel-Grinder // Tecutlan, the Searing Rift (The Lost Caverns of Ixalan #135)
Conqueror's Galleon // Conqueror's Foothold (Ixalan #234)
Conqueror's Galleon // Conqueror's Foothold (Ixalan #234)
Dowsing Dagger // Lost Vale (Ixalan #235)
Dowsing Dagger // Lost Vale (Ixalan #235)
Dowsing Device // Geode Grotto (The Lost Caverns of Ixalan #146)
Dowsing Device // Geode Grotto (The Lost Caverns of Ixalan #146)
Golden Guardian // Gold-Forge Garrison (Rivals of Ixalan #179)
Golden Guardian // Gold-Forge Garrison (Rivals of Ixalan #179)
Grasping Shadows // Shadows' Lair (The Lost Caverns of Ixalan #108)
Grasping Shadows // Shadows' Lair (The Lost Caverns of Ixalan #108)
Growing Rites of Itlimoc // Itlimoc, Cradle of the Sun (The Lost Caverns of Ixalan #188)
Growing Rites of Itlimoc // Itlimoc, Cradle of the Sun (The Lost Caverns of Ixalan #188)
Hadana's Climb // Winged Temple of Orazca (Rivals of Ixalan #158)
Hadana's Climb // Winged Temple of Orazca (Rivals of Ixalan #158)
Journey to Eternity // Atzal, Cave of Eternity (Rivals of Ixalan #160)
Journey to Eternity // Atzal, Cave of Eternity (Rivals of Ixalan #160)
Legion's Landing // Adanto, the First Fort (Ixalan #22)
Legion's Landing // Adanto, the First Fort (Ixalan #22)
Matzalantli, the Great Door // The Core (The Lost Caverns of Ixalan #256)
Matzalantli, the Great Door // The Core (The Lost Caverns of Ixalan #256)
Ojer Axonil, Deepest Might // Temple of Power (The Lost Caverns of Ixalan #158)
Ojer Axonil, Deepest Might // Temple of Power (The Lost Caverns of Ixalan #158)
Ojer Kaslem, Deepest Growth // Temple of Cultivation (The Lost Caverns of Ixalan #204)
Ojer Kaslem, Deepest Growth // Temple of Cultivation (The Lost Caverns of Ixalan #204)
Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical Time (The Lost Caverns of Ixalan #67)
Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical Time (The Lost Caverns of Ixalan #67)
Ojer Taq, Deepest Foundation // Temple of Civilization (The Lost Caverns of Ixalan #26)
Ojer Taq, Deepest Foundation // Temple of Civilization (The Lost Caverns of Ixalan #26)
Path of Mettle // Metzali, Tower of Triumph (Rivals of Ixalan #165)
Path of Mettle // Metzali, Tower of Triumph (Rivals of Ixalan #165)
Primal Amulet // Primal Wellspring (Ixalan #243)
Primal Amulet // Primal Wellspring (Ixalan #243)
Profane Procession // Tomb of the Dusk Rose (Rivals of Ixalan #166)
Profane Procession // Tomb of the Dusk Rose (Rivals of Ixalan #166)
Search for Azcanta // Azcanta, the Sunken Ruin (Ixalan #74)
Search for Azcanta // Azcanta, the Sunken Ruin (Ixalan #74)
Storm the Vault // Vault of Catlacan (Rivals of Ixalan #173)
Storm the Vault // Vault of Catlacan (Rivals of Ixalan #173)
Tarrian's Journal // The Tomb of Aclazotz (The Lost Caverns of Ixalan #126)
Tarrian's Journal // The Tomb of Aclazotz (The Lost Caverns of Ixalan #126)
Thaumatic Compass // Spires of Orazca (Ixalan #249)
Thaumatic Compass // Spires of Orazca (Ixalan #249)
The Everflowing Well // The Myriad Pools (The Lost Caverns of Ixalan #56)
The Everflowing Well // The Myriad Pools (The Lost Caverns of Ixalan #56)
Thousand Moons Smithy // Barracks of the Thousand (The Lost Caverns of Ixalan #39)
Thousand Moons Smithy // Barracks of the Thousand (The Lost Caverns of Ixalan #39)
Treasure Map // Treasure Cove (The Lost Caverns of Ixalan #267)
Treasure Map // Treasure Cove (The Lost Caverns of Ixalan #267)
Twists and Turns // Mycoid Maze (The Lost Caverns of Ixalan #217)
Twists and Turns // Mycoid Maze (The Lost Caverns of Ixalan #217)
Vance's Blasting Cannons // Spitfire Bastion (Ixalan #173)
Vance's Blasting Cannons // Spitfire Bastion (Ixalan #173)

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