21 cards where the card types include “gremlin” or the text includes “gremlin”

Barbflare Gremlin (Duskmourn: House of Horror Commander #26)
Blisterspit Gremlin (Ikoria: Lair of Behemoths #108)
Brazen Scourge (Foundations #191)
Flensermite (Mirrodin Besieged #41)
Furnace Gremlin (March of the Machine #139)
Gimbal, Gremlin Prodigy (March of the Machine Commander #3)
Gremlin Infestation (Aether Revolt #83)
Gremlin Mine (New Phyrexia #136)
Gremlin Tamer (Duskmourn: House of Horror #215)
Irreverent Gremlin (Duskmourn: House of Horror #142)
Midnight Mayhem (Duskmourn: House of Horror #222)
Phyrexian Gremlins (Antiquities #18)
Ravenous Intruder (Double Masters #141)
Razorkin Hordecaller (Duskmourn: House of Horror #152)
Release the Gremlins (Aether Revolt #96)
Ruinous Gremlin (Kaladesh #128)
Salivating Gremlins (Double Masters #143)
Scurry of Gremlins (Modern Horizons 3 #203)
Territorial Gorger (Kaladesh #136)
Terror of the Fairgrounds (Kaladesh #137)
Thriving Grubs (Kaladesh #138)

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