1 Captivating Cave
1 Cavernous Maw
1 Echoing Deeps
1 Forgotten Monument
1 Hidden Cataract
1 Hidden Courtyard
1 Hidden Necropolis
1 Hidden Nursery
1 Hidden Volcano
1 Pit of Offerings
1 Promising Vein
1 Secret Tunnel
1 Sunken Citadel
1 Sunken Palace
1 Urza's Cave
1 Volatile Fault
2 Bat Colony
1 Brass's Tunnel-Grinder // Tecutlan, the Searing Rift
1 Calamitous Cave-In
1 Compass Gnome
1 Cosmium Confluence
1 Dowsing Device // Geode Grotto
1 Gargantuan Leech
1 Grasping Shadows // Shadows' Lair
1 Scampering Surveyor
1 Sinuous Benthisaur
2 Spelunking
1 Tarrian's Journal // The Tomb of Aclazotz
1 Twists and Turns // Mycoid Maze
Sideboard: