10 cards where the cards are dual lands

Badlands (Vintage Masters #291)
Bayou (Vintage Masters #293)
Plateau (Vintage Masters #308)
Savannah (Vintage Masters #311)
Scrubland (Vintage Masters #313)
Taiga (Vintage Masters #317)
Tropical Island (Vintage Masters #321)
Tundra (Vintage Masters #322)
Underground Sea (Vintage Masters #323)
Volcanic Island (Vintage Masters #324)

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