25 cards where the colors is B and (the artist name includes “jesper” and the artist name includes “ejsing”)

Bitterblossom (Ultimate Masters #85)
Blackbloom Rogue // Blackbloom Bog (Zendikar Rising #91)
Blackbloom Rogue // Blackbloom Bog (Zendikar Rising #91)
Boggart Loggers (Lorwyn #103)
Butcher's Glee (Iconic Masters #84)
Catapult Fodder // Catapult Captain (Innistrad: Crimson Vow #99)
Catapult Fodder // Catapult Captain (Innistrad: Crimson Vow #99)
Corpse Hauler (Jumpstart #219)
Divest (Double Masters #87)
Duskhunter Bat (Modern Masters 2015 #81)
Falthis, Shadowcat Familiar (Commander Legends #126)
Fendeep Summoner (Morningtide #61)
Flesh Carver (Commander 2014 #22)
Gluttonous Guest (Innistrad: Crimson Vow #114)
Harbor Bandit (Magic 2013 #95)
Hunter of Eyeblights (Lorwyn #119)
Lolth, Spider Queen (Magic Online Promos #92690)
Lord Skitter, Sewer King (Wilds of Eldraine #97)
Nameless Inversion (Magic Online Promos #35126)
Piper of the Swarm (Magic Online Promos #78862)
Prickly Boggart (Morningtide #74)
Queen's Bay Soldier (Ixalan #115)
Soot Imp (Duel Decks Anthology: Divine vs. Demonic #37)
Unexpected Fangs (Ikoria: Lair of Behemoths #102)
Valentin, Dean of the Vein // Lisette, Dean of the Root (Strixhaven: School of Mages #161)
Valentin, Dean of the Vein // Lisette, Dean of the Root (Strixhaven: School of Mages #161)
Vow of Malice (Commander Anthology Volume II #82)
Weed Strangle (Lorwyn #147)

This search is finished. Now the real work can begin.