35 cards where the card has the keyword “Monstrosity”

Alpha Deathclaw (Fallout #91)
Arbor Colossus (Commander 2015 #174)
Chillerpillar (Modern Horizons #43)
Clay Golem (Forgotten Realms Commander #58)
Colossus of Akros (Theros #214)
Death Kiss (Commander Legends: Battle for Baldur's Gate #675)
Domesticated Hydra (Conspiracy: Take the Crown #63)
Ember Swallower (Theros #120)
Fleecemane Lion (Forgotten Realms Commander #185)
Fleetfeather Cockatrice (Journey into Nyx #149)
Giggling Skitterspike (Duskmourn: House of Horror Commander #39)
Gluttonous Cyclops (Journey into Nyx #99)
Grim Giganotosaurus (Jurassic World Collection #11)
Hundred-Handed One (Conspiracy: Take the Crown #93)
Hydra Broodmaster (Commander 2021 #194)
Hythonia the Cruel (Theros #91)
Ill-Tempered Cyclops (Conspiracy: Take the Crown #166)
Jetpack Death Seltzer (Unfinity Sticker Sheets #20)
Kalemne's Captain (Commander 2020 #92)
Keepsake Gorgon (Conspiracy: Take the Crown #141)
Nemesis of Mortals (Theros #163)
Nessian Asp (Conspiracy: Take the Crown #187)
Polis Crusher (Theros #198)
Polukranos, World Eater (Theros #172)
Ravenous Leucrocota (Conspiracy: Take the Crown #192)
Sealock Monster (Duel Decks: Elspeth vs. Kiora #42)
Shipbreaker Kraken (Commander Legends #404)
Sinuous Vermin (Conspiracy: Take the Crown #46)
Skittering Crustacean (Conspiracy: Take the Crown #36)
Splitting Slime (Conspiracy: Take the Crown #72)
Stoneshock Giant (Commander Anthology Volume II #120)
Stormbreath Dragon (Theros #143)
Swarmborn Giant (Journey into Nyx #144)
Vitality Hunter (Commander 2020 #30)
Wildfire Cerberus (Journey into Nyx #116)

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