11 cards where the set is “sld” and (((the collector number >= 1208 and the collector number <= 1212) or the collector number is “722” or the collector number is “1155” or the collector number is “1156” or the collector number is “1157” or the collector number is …

Delver of Secrets // Insectile Aberration (Secret Lair Drop #722)
Delver of Secrets // Insectile Aberration (Secret Lair Drop #722)
Esika, God of the Tree // The Prismatic Bridge (Secret Lair Drop #1155)
Esika, God of the Tree // The Prismatic Bridge (Secret Lair Drop #1155)
Archangel Avacyn // Avacyn, the Purifier (Secret Lair Drop #1156)
Archangel Avacyn // Avacyn, the Purifier (Secret Lair Drop #1156)
Bloodline Keeper // Lord of Lineage (Secret Lair Drop #1157)
Bloodline Keeper // Lord of Lineage (Secret Lair Drop #1157)
Nicol Bolas, the Ravager // Nicol Bolas, the Arisen (Secret Lair Drop #1158)
Nicol Bolas, the Ravager // Nicol Bolas, the Arisen (Secret Lair Drop #1158)
Westvale Abbey // Ormendahl, Profane Prince (Secret Lair Drop #1159)
Westvale Abbey // Ormendahl, Profane Prince (Secret Lair Drop #1159)
Esika, God of the Tree // The Prismatic Bridge (Secret Lair Drop #1208)
Esika, God of the Tree // The Prismatic Bridge (Secret Lair Drop #1208)
Archangel Avacyn // Avacyn, the Purifier (Secret Lair Drop #1209)
Archangel Avacyn // Avacyn, the Purifier (Secret Lair Drop #1209)
Bloodline Keeper // Lord of Lineage (Secret Lair Drop #1210)
Bloodline Keeper // Lord of Lineage (Secret Lair Drop #1210)
Nicol Bolas, the Ravager // Nicol Bolas, the Arisen (Secret Lair Drop #1211)
Nicol Bolas, the Ravager // Nicol Bolas, the Arisen (Secret Lair Drop #1211)
Westvale Abbey // Ormendahl, Profane Prince (Secret Lair Drop #1212)
Westvale Abbey // Ormendahl, Profane Prince (Secret Lair Drop #1212)

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