17 cards where the artist name includes “mckinnon” and the release year = 2020 and the cards were printed with new art

Medomai's Prophecy (Theros Beyond Death #53)
Mire Triton (Theros Beyond Death #105)
Allure of the Unknown (Theros Beyond Death #207)
Mythos of Snapdax (Ikoria: Lair of Behemoths #24)
Essence Scatter (Ikoria: Lair of Behemoths #49)
Mythos of Illuna (Ikoria: Lair of Behemoths #58)
Mythos of Nethroi (Ikoria: Lair of Behemoths #97)
Mythos of Vadrok (Ikoria: Lair of Behemoths #127)
Mythos of Brokkos (Ikoria: Lair of Behemoths #168)
Misty Rainforest (Secret Lair: Ultimate Edition #5)
The Prismatic Piper (Commander Legends #1)
Promise of Tomorrow (Commander Legends #39)
Feast of Succession (Commander Legends #127)
Swamp (Secret Lair Drop #119)
Sower of Temptation (Secret Lair Drop #120)
Damnation (Secret Lair Drop #121)
Enchanted Evening (Secret Lair Drop #122)

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