39 cards where the name includes “pain”

Akki War Paint (Kamigawa: Neon Dynasty #132)
Anhelo, the Painter (New Capenna Commander #1)
Brushstroke Paintermage (Unhinged #27)
Citadel of Pain (Prophecy #86)
Crushing Pain (Champions of Kamigawa #162)
Decree of Pain (Duskmourn: House of Horror Commander #136)
Efreet Flamepainter (Strixhaven: School of Mages #98)
Fervent Paincaster (Hour of Devastation #91)
Flaring Pain (Judgment #89)
Gaze of Pain (Ice Age #128)
Goblin War Paint (Battle for Zendikar #146)
Kalain, Reclusive Painter (Adventures in the Forgotten Realms #225)
Kami of the Painted Road (Champions of Kamigawa #23)
Minister of Pain (Dragons of Tarkir #111)
Moodmark Painter (Guilds of Ravnica #78)
Nin, the Pain Artist (Commander 2017 #183)
Orcish Bloodpainter (Coldsnap #94)
Painbringer (Odyssey #155)
Pain Distributor (March of the Machine Commander #33)
Painful Bond (Alchemy: Kamigawa #12)
Painful Lesson (Battlebond #154)
Painful Memories (Classic Sixth Edition #147)
Painful Quandary (Foundations #179)
Painful Truths (Outlaws of Thunder Junction Commander #146)
Painiac (Unsanctioned #55)
Pain Kami (Champions of Kamigawa #183)
Pain Magnification (Dissension #121)
Pain Seer (Born of the Gods #80)
Painsmith (Double Masters #102)
Pain's Reward (Saviors of Kamigawa #85)
Pain // Suffering (Dominaria Remastered #209)
Painted Bluffs (Outlaws of Thunder Junction Commander #309)
Painter's Servant (Shadowmoor #257)
Painter's Studio // Defaced Gallery (Duskmourn: House of Horror #147)
Painwracker Oni (Champions of Kamigawa #136)
Spellrune Painter // Spellrune Howler (Innistrad: Midnight Hunt #160)
Spellrune Painter // Spellrune Howler (Innistrad: Midnight Hunt #160)
Stabbing Pain (Magic 2011 #118)
Talon of Pain (Darksteel #150)
The Lord of Pain (Duskmourn: House of Horror Commander #3)

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