19 cards where the name includes “invoker”

Bane's Invoker (Commander Legends: Battle for Baldur's Gate #7)
Bhaal's Invoker (Commander Legends: Battle for Baldur's Gate #163)
Bloodrite Invoker (Duel Decks: Zendikar vs. Eldrazi #45)
Dawnglare Invoker (Commander Anthology Volume II #25)
Dynaheir, Invoker Adept (Commander Legends: Battle for Baldur's Gate #273)
Flamewave Invoker (Battlebond #178)
Frostwind Invoker (Rise of the Eldrazi #68)
Glintwing Invoker (Dominaria Remastered #52)
Herbology Instructor // Malady Invoker (March of the Machine #189)
Herbology Instructor // Malady Invoker (March of the Machine #189)
Lavafume Invoker (Rise of the Eldrazi #155)
Myrkul's Invoker (Commander Legends: Battle for Baldur's Gate #136)
Oran-Rief Invoker (Duel Decks: Nissa vs. Ob Nixilis #17)
Silvanus's Invoker (Commander Legends: Battle for Baldur's Gate #254)
Smokespew Invoker (Legions #81)
Starlight Invoker (Tenth Edition #47)
Stonewood Invoker (Dominaria Remastered #178)
Tymora's Invoker (Commander Legends: Battle for Baldur's Gate #101)
Valakut Invoker (Commander Legends #206)
Wildheart Invoker (Commander Legends #263)

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