20 cards where the lore includes “glissa” or the illustration contains “glissa”

Arrest (Mirrodin #2)
Bosh, Iron Golem (Commander 2021 #237)
Corrosive Gale (New Phyrexia #107)
Dross Prowler (Mirrodin #64)
Glissa, Herald of Predation (March of the Machine #226)
Glissa's Courier (Mirrodin Besieged #80)
Glissa's Retriever (Phyrexia: All Will Be One Commander #18)
Glissa's Scorn (New Phyrexia #110)
Glissa Sunseeker (Mirrodin #120)
Glissa Sunslayer (Phyrexia: All Will Be One #202)
Glissa Sunslayer // Glissa Sunslayer (Phyrexia: All Will Be One Art Series #47)
Glissa Sunslayer // Glissa Sunslayer (Phyrexia: All Will Be One Art Series #47)
Glissa, the Traitor (Mirrodin Besieged #96)
Incubation Sac (Phyrexia: All Will Be One #171)
Lattice-Blade Mantis (Phyrexia: All Will Be One #173)
Pistus Strike (Mirrodin Besieged #86)
Rustvine Cultivator (Phyrexia: All Will Be One #181)
Slobad, Goblin Tinkerer (Commander 2016 #133)
Sundering Titan (Double Masters #292)
Tempest of Light (Mirrodin #28)
Wet Willie of the Damned (Unhinged #66)

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