13 cards where (the artist name includes “marc” and the artist name includes “fishman”)

Angelic Page (Seventh Edition #1)
Bereavement (Seventh Edition #120)
Blazing Specter (Invasion #236)
Blinding Light (Invasion #9)
Cloud Cover (Planeshift #98)
Compost (Seventh Edition #235)
Engulfing Flames (Odyssey #191)
Escape Routes (Planeshift #25)
March of Souls (Planeshift #10)
Mind Burst (Odyssey #148)
Scent of Cinder (Urza's Destiny #96)
Wall of Vipers (Prophecy #80)
Wild Colos (Urza's Destiny #100)

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