33 cards where (the text includes “search” and the text includes “library” and the text includes “land” and the text includes “battlefield”) and the cards are colorless and it’s legal in Pioneer

Blighted Woodland (Commander Legends: Battle for Baldur's Gate #881)
Boseiju, Who Endures (Kamigawa: Neon Dynasty #266)
Brokers Hideout (Streets of New Capenna #248)
Burnished Hart (Commander Masters #373)
Campus Guide (Strixhaven: School of Mages #252)
Case of the Shattered Pact (Murders at Karlov Manor #1)
Compass Gnome (The Lost Caverns of Ixalan #250)
Demolition Field (Outlaws of Thunder Junction Commander #283)
Dune Mover (Phyrexia: All Will Be One #226)
Ecologist's Terrarium (Kamigawa: Neon Dynasty #246)
Escape Tunnel (Murders at Karlov Manor #261)
Evolving Wilds (Outlaws of Thunder Junction Commander #292)
Fabled Passage (Core Set 2021 #246)
Farfinder (Ikoria: Lair of Behemoths #2)
Field of Ruin (March of the Machine Commander #400)
Golos, Tireless Pilgrim (Core Set 2020 #226)
Maestros Theater (Streets of New Capenna #251)
Obscura Storefront (Streets of New Capenna #252)
Pilgrim's Eye (Commander Masters #402)
Promising Vein (The Lost Caverns of Ixalan #279)
Realmbreaker, the Invasion Tree (March of the Machine #263)
Renegade Map (Aether Revolt #173)
Ruin in Their Wake (Oath of the Gatewatch #122)
Scampering Surveyor (The Lost Caverns of Ixalan #260)
Silver Deputy (Outlaws of Thunder Junction #248)
Skittering Surveyor (March of the Machine #264)
Solemn Simulacrum (Murders at Karlov Manor Commander #238)
Sword of the Animist (Commander Masters #413)
Terramorphic Expanse (Outlaws of Thunder Junction Commander #336)
The World Tree (Kaldheim #275)
Urza's Sylex (The Brothers' War #40)
Volatile Fault (The Lost Caverns of Ixalan #286)
Warped Landscape (Commander 2018 #291)

In the blink of an eye, they strode from deep snow to the end of this search.