40 cards where the illustration contains “flying-rock”

Ageless Sentinels (Scourge #1)
Ayula's Influence (Modern Horizons #156)
Barbed Shocker (Time Spiral #144)
Belt of Giant Strength (Forgotten Realms Commander #38)
Bloodfire Colossus (Apocalypse #55)
Boom // Bust (Planar Chaos #112)
Chartooth Cougar (Scourge #84)
Coalition Warbrute (Dominaria United #118)
Deus of Calamity (Shadowmoor #204)
Downdraft (Weatherlight #125)
Dwarven Demolition Team (Limited Edition Alpha #142)
Earthblighter (Legions #68)
Elemental Uprising (Oath of the Gatewatch #130)
Excavation Mole (Ikoria: Lair of Behemoths #150)
Goring Warplow (The Brothers' War #120)
Granite Grip (Urza's Legacy #81)
Hill Giant (Tenth Edition #212)
Hurly-Burly (Lorwyn #177)
Landslide (Urza's Destiny #92)
Maelstrom Nexus (Alara Reborn #130)
Nature's Revolt (Tempest #240)
Ow (Unglued #36)
Pardic Miner (Odyssey #212)
Rockshard Elemental (Legions #109)
Rock Slide (Visions #92)
Rolling Stones (Seventh Edition #35)
Ruination (Stronghold #95)
Sanctuary Smasher (Ikoria: Lair of Behemoths #135)
Savage Twister (Mirage #280)
Seismic Mage (Mercadian Masques #211)
Seismic Strike (Magic 2010 #154)
Sentinel Tower (Battlebond #79)
Skirk Volcanist (Scourge #104)
Smashing Success (Kaldheim #151)
Spitting Earth (Seventh Edition #220)
Timely Reinforcements (Magic 2012 #40)
Torrent of Stone (Betrayers of Kamigawa #119)
Tremor (Visions #99)
Tunneler Wurm (Judgment #135)
Volley of Boulders (Odyssey #227)

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