60 cards where the set is “fdn” and the collector number >= 362 and the collector number <= 421

Abyssal Harvester (Foundations #381)
Ajani, Caller of the Pride (Foundations #417)
Alesha, Who Laughs at Fate (Foundations #404)
Anthem of Champions (Foundations #405)
Arahbo, the First Fang (Foundations #363)
Archmage of Runes (Foundations #372)
Ashroot Animist (Foundations #406)
Banner of Kinship (Foundations #413)
Blasphemous Edict (Foundations #382)
Bloodthirsty Conqueror (Foundations #383)
Celestial Armor (Foundations #364)
Chandra, Flameshaper (Foundations #420)
Crystal Barricade (Foundations #365)
Curator of Destinies (Foundations #373)
Drake Hatcher (Foundations #374)
Electroduplicate (Foundations #390)
Elenda, Saint of Dusk (Foundations #407)
Etali, Primal Storm (Foundations #391)
Exemplar of Light (Foundations #366)
Genesis Wave (Foundations #396)
Ghalta, Primal Hunger (Foundations #397)
Giada, Font of Hope (Foundations #367)
Herald of Eternal Dawn (Foundations #368)
High Fae Trickster (Foundations #375)
High-Society Hunter (Foundations #384)
Homunculus Horde (Foundations #376)
Kaito, Cunning Infiltrator (Foundations #418)
Kellan, Planar Trailblazer (Foundations #392)
Kiora, the Rising Tide (Foundations #377)
Koma, World-Eater (Foundations #408)
Kykar, Zephyr Awakener (Foundations #409)
Lathril, Blade of the Elves (Foundations #410)
Leyline Axe (Foundations #414)
Liliana, Dreadhorde General (Foundations #419)
Loot, Exuberant Explorer (Foundations #398)
Lunar Insight (Foundations #378)
Mossborn Hydra (Foundations #399)
Nine-Lives Familiar (Foundations #385)
Niv-Mizzet, Visionary (Foundations #411)
Omniscience (Foundations #379)
Phyrexian Arena (Foundations #386)
Preposterous Proportions (Foundations #400)
Quilled Greatwurm (Foundations #401)
Raise the Past (Foundations #369)
Rise of the Dark Realms (Foundations #387)
Rite of the Dragoncaller (Foundations #393)
Scrawling Crawler (Foundations #415)
Searslicer Goblin (Foundations #394)
Sire of Seven Deaths (Foundations #362)
Skyknight Squire (Foundations #370)
Soulstone Sanctuary (Foundations #416)
Sphinx of Forgotten Lore (Foundations #380)
Spinner of Souls (Foundations #402)
Sylvan Scavenging (Foundations #403)
Tinybones, Bauble Burglar (Foundations #388)
Twinflame Tyrant (Foundations #395)
Valkyrie's Call (Foundations #371)
Vivien Reid (Foundations #421)
Zimone, Paradox Sculptor (Foundations #412)
Zul Ashur, Lich Lord (Foundations #389)

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