42 cards where the illustration contains “sheath”

Ancestral Katana (Kamigawa: Neon Dynasty #1)
Aura Barbs (Betrayers of Kamigawa #94)
Barrow-Blade (The Lord of the Rings: Tales of Middle-earth #237)
Battle-Mad Ronin (Champions of Kamigawa #156)
Conclave Phalanx (Ravnica: City of Guilds #10)
Cut Down (Dominaria United #89)
Duke Ulder Ravengard (Commander Legends: Battle for Baldur's Gate #272)
Elite Vanguard (Magic 2010 #9)
Hand of Honor (Saviors of Kamigawa #12)
Heir of the Ancient Fang (Kamigawa: Neon Dynasty #325)
Higure, the Still Wind (Betrayers of Kamigawa #37)
Iizuka the Ruthless (Saviors of Kamigawa #104)
Imoen, Chaotic Trickster (Alchemy Horizons: Baldur's Gate #7r)
Imoen, Honorable Trickster (Alchemy Horizons: Baldur's Gate #7w)
Imoen, Mystic Trickster (Commander Legends: Battle for Baldur's Gate #77)
Imoen, Occult Trickster (Alchemy Horizons: Baldur's Gate #7b)
Imoen, Wily Trickster (Alchemy Horizons: Baldur's Gate #7u)
Imoen, Wise Trickster (Alchemy Horizons: Baldur's Gate #7g)
Inner-Chamber Guard (Saviors of Kamigawa #13)
Isao, Enlightened Bushi (Betrayers of Kamigawa #129)
Isshin, Two Heavens as One (Kamigawa: Neon Dynasty #224)
Jukai Trainee (Kamigawa: Neon Dynasty #326)
Kemba, Kha Regent (Scars of Mirrodin #12)
Knight of Dawn's Light (Dominaria United #23)
Kytheon, Hero of Akros // Gideon, Battle-Forged (San Diego Comic-Con 2015 #23)
Kytheon, Hero of Akros // Gideon, Battle-Forged (San Diego Comic-Con 2015 #23)
Life of Toshiro Umezawa // Memory of Toshiro (Kamigawa: Neon Dynasty #108)
Life of Toshiro Umezawa // Memory of Toshiro (Kamigawa: Neon Dynasty #108)
Malicious Malfunction (Kamigawa: Neon Dynasty #110)
Matsu-Tribe Decoy (Champions of Kamigawa #227)
Nagao, Bound by Honor (Champions of Kamigawa #36)
Oboro Envoy (Saviors of Kamigawa #49)
Paragon of the Amesha (Conflux #14)
Queen Allenal of Ruadach (Dominaria United #210)
Raiyuu, Storm's Edge (Kamigawa: Neon Dynasty #232)
Samurai of the Pale Curtain (Champions of Kamigawa #43)
Seven-Tail Mentor (Kamigawa: Neon Dynasty #36)
Sky-Blessed Samurai (Kamigawa: Neon Dynasty #37)
Slaughter (Exodus #74)
Sokenzan Renegade (Saviors of Kamigawa #114)
Stangg, Echo Warrior (Dominaria United Commander #64)
The Wandering Emperor (Kamigawa: Neon Dynasty #42)
Thrull (Modern Masters 2015 Tokens #8)
Walker of Secret Ways (Betrayers of Kamigawa #60)

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