21 cards where the name includes “planar”

Extraplanar Lens (Commander Masters #381)
Interplanar Beacon (Commander Masters #1004)
Kellan, Planar Trailblazer (Foundations #91)
Planar Ally (Adventures in the Forgotten Realms #31)
Planar Atlas (The List #J22-51)
Planar Birth (Urza's Saga #31)
Planar Bridge (Double Masters 2022 #313)
Planar Chaos (Judgment #97)
Planar Cleansing (Core Set 2020 #33)
Planar Collapse (Urza's Legacy #18)
Planar Despair (Apocalypse #50)
Planar Disruption (Phyrexia: All Will Be One #28)
Planar Gate (Masters Edition IV #221)
Planar Genesis (Modern Horizons 3 #198)
Planar Guide (Legions #18)
Planar Incision (Kamigawa: Neon Dynasty #72)
Planar Nexus (Modern Horizons 3 Commander #80)
Planar Outburst (New Capenna Commander #209)
Planar Overlay (Planeshift #28)
Planar Portal (Eighth Edition #311)
Planar Void (Urza's Saga #149)

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