45 cards where the text includes “ninjutsu”

A-Dokuchi Silencer (Kamigawa: Neon Dynasty #A-95)
A-Moon-Circuit Hacker (Kamigawa: Neon Dynasty #A-67)
A-Nashi, Moon Sage's Scion (Kamigawa: Neon Dynasty #A-114)
A-Nezumi Prowler (Kamigawa: Neon Dynasty #A-116)
A-Prosperous Thief (Kamigawa: Neon Dynasty #A-73)
A-Satoru Umezawa (Kamigawa: Neon Dynasty #A-234)
A-Silver-Fur Master (Kamigawa: Neon Dynasty #A-236)
A-Thousand-Faced Shadow (Kamigawa: Neon Dynasty #A-86)
Azra Smokeshaper (Modern Horizons #79)
Biting-Palm Ninja (Kamigawa: Neon Dynasty #88)
Blade-Blizzard Kitsune (Kamigawa: Neon Dynasty #5)
Coiling Stalker (Kamigawa: Neon Dynasty #179)
Covert Technician (Kamigawa: Neon Dynasty #49)
Dokuchi Shadow-Walker (Kamigawa: Neon Dynasty #94)
Dokuchi Silencer (Kamigawa: Neon Dynasty #95)
Fallen Shinobi (Outlaws of Thunder Junction Commander #226)
Higure, the Still Wind (Planechase Anthology #18)
Ingenious Infiltrator (Modern Horizons #204)
Ink-Eyes, Servant of Oni (Planechase Anthology #33)
Jukai Liberator (Alchemy: Kamigawa #27)
Kappa Tech-Wrecker (Kamigawa: Neon Dynasty #198)
Mistblade Shinobi (Planechase Anthology #20)
Mist-Syndicate Naga (Modern Horizons #58)
Moonblade Shinobi (Modern Horizons #59)
Moon-Circuit Hacker (Kamigawa: Neon Dynasty #67)
Moonsnare Specialist (Kamigawa: Neon Dynasty #70)
Mukotai Ambusher (Kamigawa: Neon Dynasty #112)
Nashi, Moon Sage's Scion (Outlaws of Thunder Junction Commander #143)
Nezumi Prowler (Kamigawa: Neon Dynasty #116)
Ninja of the Deep Hours (Commander 2018 #95)
Ninja of the New Moon (Modern Horizons #99)
Okiba-Gang Shinobi (Planechase Anthology #35)
Orochi Soul-Reaver (Outlaws of Thunder Junction Commander #22)
Prosperous Thief (Kamigawa: Neon Dynasty #73)
Sakashima's Student (Planechase Anthology #24)
Satoru Umezawa (Kamigawa: Neon Dynasty #234)
Silent-Blade Oni (Outlaws of Thunder Junction Commander #241)
Silver-Fur Master (Kamigawa: Neon Dynasty #236)
Skullsnatcher (Planechase Anthology #36)
Spring-Leaf Avenger (Kamigawa: Neon Dynasty #208)
Swarm Saboteur (Alchemy: Kamigawa #13)
Thousand-Faced Shadow (Kamigawa: Neon Dynasty #86)
Throat Slitter (Planechase Anthology #37)
Walker of Secret Ways (Planechase Anthology #27)
Yuriko, the Tiger's Shadow (Commander Masters #364)

Though this query has ended, its relics still slumber in New Argive.