Your search for "*monster of the abyss*" revealed the following:
Abyssal Persecutor
[Commander 2014]
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Ash Blossom & Joyous Spring
[SDCB-EN014 Common]
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Elesh Norn, Mother of Machines (Borderless Manga Step-and-Compleat Foil)
[Phyrexia: All Will Be One]
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Elesh Norn, Mother of Machines (Borderless Manga Step-and-Compleat Foil)
[Phyrexia: All Will Be One]
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Master of OZ
[SOD-EN035 Ultimate Rare]
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Invasion of Ikoria // Zilortha, Apex of Ikoria
[March of the Machine Prerelease Promos]
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Invasion of Ikoria // Zilortha, Apex of Ikoria
[March of the Machine Prerelease Promos]
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Fiend Reflection #2
[LOB-EN021 Common]
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Blight Titan (Extended Art)
[March of the Machine Commander]
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Number 23: Lancelot, Dark Knight of the Underworld
[BOSH-ENSE2 Super Rare]
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Number 23: Lancelot, Dark Knight of the Underworld
[BOSH-ENSE2 Super Rare]
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Fiend Reflection #2
[LOB-021 Common]
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Dark Valkyria
[BP02-EN064 Mosaic Rare]
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Underworld Goddess of the Closed World (Secret Rare)
[RA02-EN045 Secret Rare]
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Underworld Goddess of the Closed World (Secret Rare)
[RA02-EN045 Secret Rare]
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Cyber Jar
[BP02-EN007 Mosaic Rare]
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Chevill, Bane of Monsters (Extended Art)
[Ikoria: Lair of Behemoths]
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Giggling Skitterspike (Extended Art)
[Duskmourn: House of Horror Commander]
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Giggling Skitterspike (Extended Art)
[Duskmourn: House of Horror Commander]
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Buster Gundil the Cubic Behemoth
[MVP1-ENG35 Gold Rare]
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Warrior of Atlantis
[FOTB-EN016 Ultimate Rare]
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