53 cards where the illustration contains “trident”

Amphibious Kavu (Planeshift #78)
Arrest (Mercadian Masques #4)
Bog Wreckage (Odyssey #314)
Breaking Wave (Invasion #48)
Buoyancy (Mercadian Masques #63)
Cetavolver (Apocalypse #21)
Coral Merfolk (Magic 2010 #47)
Cowardice (Mercadian Masques #70)
Cyclops Gladiator (Magic 2011 #131)
Emperor Mihail II (Dominaria United Commander #23)
Enlarge (Magic 2014 #170)
Fin-Clade Fugitives (Commander Legends #227)
Firescreamer (Invasion #106)
Galina's Knight (Invasion #248)
Glowing Anemone (Mercadian Masques #81)
Independent Troops (Portal Three Kingdoms #114)
Intruder Alarm (Eighth Edition #86)
Kiora's Follower (Born of the Gods #150)
Kiora's Follower (Born of the Gods Promos #150)
Knight of the Mists (Visions #36)
Lord of Atlantis (30th Anniversary History Promos #2)
Lord of Atlantis (Magic Online Promos #69945)
Meng Huo's Horde (Portal Three Kingdoms #143)
Merfolk (Ixalan Tokens #3)
Merfolk of the Pearl Trident (Seventh Edition #90)
Merfolk of the Pearl Trident (Portal #60)
Merfolk of the Pearl Trident (Fifth Edition #104)
Merfolk // Treasure (Friday Night Magic 2018 #1)
Merfolk // Treasure (Friday Night Magic 2018 #1)
Pearlspear Courier (Onslaught #48)
Portent of Betrayal (Theros #133)
Prime Speaker Vannifar (Ravnica Allegiance #195)
Prime Speaker Zegana (Gatecrash #188)
Razorfin Hunter (Apocalypse #119)
Rotisserie Elemental (Wilds of Eldraine #148)
Runo Stromkirk // Krothuss, Lord of the Deep (Innistrad: Crimson Vow #246)
Runo Stromkirk // Krothuss, Lord of the Deep (Innistrad: Crimson Vow #246)
Runo Stromkirk // Krothuss, Lord of the Deep (Innistrad: Crimson Vow #316)
Runo Stromkirk // Krothuss, Lord of the Deep (Innistrad: Crimson Vow #316)
Seagraf Skaab (Shadows over Innistrad #84)
Serum Visions (Secret Lair Drop #32)
Servant of Tymaret (Born of the Gods #82)
Squeeze (Mercadian Masques #105)
Strategic Planning // Strategic Planning (Strixhaven Art Series #68)
Strategic Planning // Strategic Planning (Strixhaven Art Series #68)
Strategic Planning // Strategic Planning (Strixhaven Art Series #68s)
Strategic Planning // Strategic Planning (Strixhaven Art Series #68s)
Surestrike Trident (Darksteel #147)
Thrasios, Triton Hero (Commander 2016 #46)
Thrasios, Triton Hero (Special Guests #16)
Tidal Courier (Apocalypse #31)
Tormentor's Trident (Avacyn Restored #222)
Triton Cavalry (Journey into Nyx #55)
Viashino Weaponsmith (Urza's Saga #226)
Vodalian Soldiers (Fallen Empires #31c)
War-Wing Siren (Journey into Nyx #57)
Wild Maenads (Defeat a God #7)
Zareth San, the Trickster (Zendikar Rising #242)

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