38 cards where the illustration contains “complete-coalitio...”

Arctic Merfolk (Planeshift #21)
Ardent Soldier (Invasion #3)
Argivian Cavalier (Dominaria United #4)
Breath of Darigaaz (Invasion #138)
Canopy Surge (Invasion #184)
Chromatic Sphere (Invasion #299)
Coalition Construct (Alchemy: Dominaria #30)
Coalition Flag (Apocalypse #2)
Coalition Relic (Masters 25 #223)
Coalition Relic (Future Sight #161)
Emblazoned Golem (Apocalypse #136)
Ertai's Trickery (Planeshift #24)
Explosive Growth (Invasion #187)
Gerrard's Command (Planeshift #109)
Gerrard, Weatherlight Hero (Commander 2019 #41)
Heroes' Reunion (Invasion #250)
Hypnotic Cloud (Invasion #109)
Kangee, Aerie Keeper (Invasion #253)
Kavu Aggressor (Invasion #148)
Llanowar Elite (Invasion #196)
Llanowar Greenwidow (Dominaria United #169)
Nishoba Brawler (Dominaria United #174)
Nishoba Brawler (Dominaria United #434)
Orim's Touch (Invasion #23)
Overload (Invasion #157)
Phyrexian Scuta (Planeshift #51)
Pincer Spider (Invasion #201)
Primal Growth (Planeshift #87)
Prohibit (Invasion #67)
Relic of Legends (Dominaria United #236)
Saproling Infestation (Invasion #208)
Skyship Weatherlight (Magic Online Promos #62381)
Sphinx of Clear Skies (Dominaria United #396)
Unite the Coalition (Dominaria United Commander #15)
Urborg Skeleton (Invasion #134)
Urborg Skeleton (Invasion #134★)
Verdeloth the Ancient (Invasion #220)
Vodalian Serpent (Invasion #86)

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