Your search for "*monster of the abyss*" revealed the following:

Lords of Madness: The Book of Aberrations (Dungeons & Dragons d20 3.5 Fantasy Roleplaying Supplement)

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Dark Magician of Chaos
[BP02-EN023 Mosaic Rare]

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Veidos the Dragon of Endless Darkness
[LEDE-EN092 Ultra Rare]

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Bazoo the Soul-Eater
[LON-064 Super Rare]

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Goblin Attack Force
[BP02-EN008 Mosaic Rare]

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Ancient Gear Golem
[BP02-EN035 Mosaic Rare]

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Abyssal Specter
[Eighth Edition]

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Monstrosity of the Lake (Extended Art)
[The Lord of the Rings: Tales of Middle-Earth Commander]

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Obelisk the Tormentor (DVD Promo)
[MVPC-EN001 Gold Rare]

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Darklord Zerato
[BP02-EN060 Mosaic Rare]

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Samurai of the Ice Barrier
[BP02-EN088 Mosaic Rare]

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Abyssal Specter (Divine vs. Demonic)
[Duel Decks Anthology]

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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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Abyssal Persecutor
[Worldwake]

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