42 cards where (the text includes “first” and the text includes “strike”) and the card types include “creature” and the colors is B

Nightscape Apprentice (Invasion #112)
Ridged Kusite (Time Spiral Remastered #134)
Battle Brawler (Fate Reforged #63)
Black Knight (Masters Edition IV #71)
Ghost Hounds (Homelands #49)
Gurmag Swiftwing (Ravnica: Clue Edition #113)
Knight of Malice (Dominaria #97)
Knight of Stromgald (Masters Edition II #99)
Lightfoot Rogue (Adventures in the Forgotten Realms #111)
Order of the Ebon Hand (Masters Edition #78)
Vampire Hexmage (Double Masters #112)
Altar of the Wretched // Wretched Bonemass (The Lost Caverns of Ixalan Commander #10)
Altar of the Wretched // Wretched Bonemass (The Lost Caverns of Ixalan Commander #10)
Drana, Liberator of Malakir (The Lost Caverns of Ixalan Commander #193)
Lim-Dûl's High Guard (Masters Edition II #103)
Nirkana Cutthroat (Rise of the Eldrazi #119)
Pestilent Kathari (Conflux #50)
Phyrexian Crusader (Mirrodin Besieged #50)
Sanguine Guard (Duel Decks: Phyrexia vs. the Coalition #9)
Urborg Scavengers (March of the Machine: The Aftermath #15)
Xathrid Slyblade (Magic 2015 #124)
Abattoir Ghoul (Duel Decks: Blessed vs. Cursed #50)
Kezzerdrix (Tempest Remastered #107)
Mirri the Cursed (Time Spiral Remastered #125)
Nekrataal (Eternal Masters #99)
Nightshade Assassin (Time Spiral Remastered #128)
Pit Raptor (Prophecy #72)
Skorpekh Destroyer (Warhammer 40,000 Commander #57)
Unyielding Krumar (Khans of Tarkir #94)
Volcano Imp (Planeshift #56)
Cairn Wanderer (Commander 2020 #130)
Purraj of Urborg (Mirage #135)
Spitting Sliver (Planar Chaos #80)
Cosmic Horror (Masters Edition III #61)
Ebon Praetor (Masters Edition II #89)
Soulflayer (Commander 2020 #138)
Yawgmoth Demon (Ninth Edition #170)
Pit Spawn (Exodus #70)
Tresserhorn Skyknight (Coldsnap #73)
Infernal Spawn of Evil (Unsanctioned #38)
Spirit of the Night (Mirage #146)
Infernal Spawn of Infernal Spawn of Evil (Unsanctioned #39)
Infernius Spawnington III, Esq. (Unsanctioned #40)

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