Your search for "*monster of the abyss*" revealed the following:
Big Eye
[BPW2-EN003 Common]
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Black Luster Soldier - Soldier of Chaos
[GFTP-EN132 Ghost Rare]
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The Dead Marshes - Urborg, Tomb of Yawgmoth (Serialized)
[The Lord of the Rings: Tales of Middle-Earth Commander]
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The Dead Marshes - Urborg, Tomb of Yawgmoth (Serialized)
[The Lord of the Rings: Tales of Middle-Earth Commander]
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Advanced Crystal Beast Amber Mammoth
[BLCR-EN014 Secret Rare]
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Toby, Beastie Befriender
[Duskmourn: House of Horror Prerelease Promos]
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Vivien, Monsters' Advocate
[Ikoria: Lair of Behemoths]
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Different Dimension Dragon (25th Anniversary)
[DCR-EN015 Super Rare]
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Magician of Faith
[BP02-EN005 Mosaic Rare]
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Axe Dragonute
[BP02-EN096 Mosaic Rare]
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Mobius the Frost Monarch
[SOD-EN022 Ultimate Rare]
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Drillroid
[BP02-EN038 Mosaic Rare]
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Redhorn Pass - Mouth of Ronom (Serialized)
[The Lord of the Rings: Tales of Middle-Earth Commander]
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Redhorn Pass - Mouth of Ronom (Serialized)
[The Lord of the Rings: Tales of Middle-Earth Commander]
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Plaguespreader Zombie
[BP02-EN071 Mosaic Rare]
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Descend on the Prey
[Born of the Gods Battle the Horde]
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Darklord Zerato
[BP02-EN060 Rare]
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Moray of Greed
[SBAD-EN034 Common]
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