44 cards where the artist name includes “john severin brassell”

Alpine Grizzly (Khans of Tarkir #127)
Angelic Exaltation (Ravnica Allegiance #2)
Aven Battle Priest (Magic Origins #6)
Aven Sunstriker (Dragons of Tarkir #5)
Bonecrusher Giant // Stomp (Throne of Eldraine #291)
Call for Unity (Aether Revolt #9)
Coordinated Assault (Theros #116)
Crystal Dragon // Rob the Hoard (Commander Legends: Battle for Baldur's Gate #13)
Dire Fleet Interloper (Ixalan #103)
Disciple of Phenax (Theros #84)
Drake (Amonkhet Tokens #18)
Drake Haven (Amonkhet #51)
Favored of Iroas (Theros Beyond Death #15)
Feaster of Fools (Modern Horizons #90)
Gauntlet of Power (Kaladesh Inventions #12)
Goblin // Soldier (GRN Guild Kit Tokens #4)
Goblin // Soldier (GRN Guild Kit Tokens #4)
Goliath Paladin (Commander Legends: Battle for Baldur's Gate #21)
Highland Game (Khans of Tarkir #135)
Horn of Valhalla // Ysgard's Call (Commander Legends: Battle for Baldur's Gate #26)
Hushwing Gryff (Magic 2015 #15)
Illusion of Choice (Conspiracy: Take the Crown #31)
Jackhammer (Streets of New Capenna #111)
Loyal Pegasus (Born of the Gods #19)
Merchant of the Vale // Haggle (Throne of Eldraine #293)
Mogis's Warhound (Journey into Nyx #104)
Night's Whisper (Duel Decks: Jace vs. Vraska #68)
Obelisk of Urd (Magic 2015 #222)
Plea for Power (Conspiracy #24)
Rakshasa Deathdealer (Khans of Tarkir #192)
Reap the Past (Modern Horizons #211)
Reins of Power (Commander 2016 #96)
Restoration Gearsmith (Kaladesh #185)
Short Sword (Dominaria #229)
Skyswirl Harrier (Kaladesh #28)
Soldier (Guilds of Ravnica Tokens #2)
Soldier // Soldier (GRN Guild Kit Tokens #2)
Soldier // Soldier (GRN Guild Kit Tokens #2)
Steppe Glider (Oath of the Gatewatch #36)
Sunmane Pegasus (Theros Beyond Death #38)
Tidebinder Mage (Magic 2014 #73)
Training Grounds (March of the Machine: The Aftermath #193)
Vampire (Ixalan Tokens #1)
Vampire // Treasure (Friday Night Magic 2017 #10)
Vampire // Treasure (Friday Night Magic 2017 #10)
Wave-Wing Elemental (Battle for Zendikar #88)
Wind Drake (Dragon's Maze #20)

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