Your search for "*monster of the abyss*" revealed the following:
Obelisk the Tormentor (DVD Promo)
[MVPC-EN001 Gold Rare]
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Samurai of the Ice Barrier
[BP02-EN088 Mosaic Rare]
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Peer into the Abyss (Promo Pack)
[Core Set 2021 Promos]
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Obelisk the Tormentor
[MVPC-EN001 Gold Secret Rare]
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Tanngrisnir of the Nordic Beasts
[BP02-EN094 Mosaic Rare]
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Mimighoul Charm (Quarter Century Secret Rare)
[ROTA-EN096 Quarter Century Secret Rare]
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Mimighoul Charm (Quarter Century Secret Rare)
[ROTA-EN096 Quarter Century Secret Rare]
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Darkworld Thorns
[LOB-EN114 Common]
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Abyssal Specter
[Duels of the Planeswalkers]
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Albaz the Ashen
[POTE-EN011 Super Rare]
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Terra the Terrible
[LOB-EN080 Common]
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Abyssal Harvester (Borderless) (Mana Foil)
[Foundations]
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Umbral Horror Will o' the Wisp
[JOTL-EN014 Common]
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D.D. Assailant
[BP02-EN028 Rare]
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Sea Monster of Theseus
[MP17-EN231 Secret Rare]
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D.D. Warrior Lady
[BP02-EN021 Mosaic Rare]
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Mermail Abyssbalaen
[LTGY-EN083 Ultra Rare]
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