35 cards where the set is “ddg” and the collector number >= 47

Bogardan Hellkite (Duel Decks: Knights vs. Dragons #47)
Cinder Wall (Duel Decks: Knights vs. Dragons #48)
Skirk Prospector (Duel Decks: Knights vs. Dragons #49)
Bloodmark Mentor (Duel Decks: Knights vs. Dragons #50)
Fire-Belly Changeling (Duel Decks: Knights vs. Dragons #51)
Mudbutton Torchrunner (Duel Decks: Knights vs. Dragons #52)
Dragonspeaker Shaman (Duel Decks: Knights vs. Dragons #53)
Dragon Whelp (Duel Decks: Knights vs. Dragons #54)
Henge Guardian (Duel Decks: Knights vs. Dragons #55)
Voracious Dragon (Duel Decks: Knights vs. Dragons #56)
Bogardan Rager (Duel Decks: Knights vs. Dragons #57)
Mordant Dragon (Duel Decks: Knights vs. Dragons #58)
Kilnmouth Dragon (Duel Decks: Knights vs. Dragons #59)
Shivan Hellkite (Duel Decks: Knights vs. Dragons #60)
Thunder Dragon (Duel Decks: Knights vs. Dragons #61)
Armillary Sphere (Duel Decks: Knights vs. Dragons #62)
Dragon's Claw (Duel Decks: Knights vs. Dragons #63)
Breath of Darigaaz (Duel Decks: Knights vs. Dragons #64)
Dragon Fodder (Duel Decks: Knights vs. Dragons #65)
Punishing Fire (Duel Decks: Knights vs. Dragons #66)
Spitting Earth (Duel Decks: Knights vs. Dragons #67)
Captive Flame (Duel Decks: Knights vs. Dragons #68)
Ghostfire (Duel Decks: Knights vs. Dragons #69)
Seething Song (Duel Decks: Knights vs. Dragons #70)
Seismic Strike (Duel Decks: Knights vs. Dragons #71)
Claws of Valakut (Duel Decks: Knights vs. Dragons #72)
Temporary Insanity (Duel Decks: Knights vs. Dragons #73)
Shiv's Embrace (Duel Decks: Knights vs. Dragons #74)
Cone of Flame (Duel Decks: Knights vs. Dragons #75)
Fiery Fall (Duel Decks: Knights vs. Dragons #76)
Jaws of Stone (Duel Decks: Knights vs. Dragons #77)
Mountain (Duel Decks: Knights vs. Dragons #78)
Mountain (Duel Decks: Knights vs. Dragons #79)
Mountain (Duel Decks: Knights vs. Dragons #80)
Mountain (Duel Decks: Knights vs. Dragons #81)

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