37 cards where the colors is B and the text matches the regex /all creatures get \smm until end of turn/

Hell Swarm (Legends #103)
Marsh Gas (Fourth Edition #146)
Nausea (Eternal Masters #97)
Shrivel (Modern Masters 2015 #95)
Choking Miasma (Dominaria United #86)
Cry of the Carnarium (Ravnica Allegiance #70)
Death's-Head Buzzard (Masters 25 #84)
Drown in Sorrow (Commander Masters #154)
Glistening Deluge (March of the Machine #107)
Golden Demise (Rivals of Ixalan #73)
Infest (Ravnica: Clue Edition #114)
Malicious Eclipse (The Lost Caverns of Ixalan #111)
Malicious Malfunction (Kamigawa: Neon Dynasty #110)
Mephitic Vapors (Ravnica Remastered #85)
Pestilent Haze (Core Set 2021 #118)
Toxic Deluge (Murders at Karlov Manor Commander #142)
Bane of the Living (Commander 2019 #104)
Biting Rain (Shadows over Innistrad #102)
Hideous Laughter (Champions of Kamigawa #115)
Languish (Jumpstart #246)
Massacre (Nemesis #58)
Mutilate (Duel Decks Anthology: Garruk vs. Liliana #55)
Rising Miasma (Battle for Zendikar #122)
Terisiare's Devastation (The Brothers' War Commander #9)
Terror Tide (The Lost Caverns of Ixalan #127)
Yahenni's Expertise (Aether Revolt #75)
Blight Grenade (Warhammer 40,000 Commander #31)
Final Revels (Lorwyn #113)
Kagemaro, First to Suffer (Saviors of Kamigawa #73)
Night Incarnate (Commander 2018 #17)
Plague Dogs (Urza's Destiny #66)
Planar Despair (Apocalypse #50)
Cloudkill (Commander Legends: Battle for Baldur's Gate #121)
Feast of Succession (Commander Masters #158)
Havoc Demon (Eternal Masters #90)
Ichor Explosion (New Phyrexia #64)
Decree of Pain (Commander Masters #148)

The arc of my blade has carved a path of light to the end of these results.