Your search for "*monster of the abyss*" revealed the following:
Otoshidamashi
[MP22-EN074 Ultra Rare]
Sold Out
Mosaic Manticore
[BP02-EN073 Rare]
Sold Out
Phantasmal Abomination
[Rise of the Eldrazi]
Sold Out
Submarineroid
[POTD-EN008 Ultimate Rare]
Sold Out
Deep Diver
[SDRE-EN019 Common]
Sold Out
Overlord of the Floodpits (Japan Showcase) (Japanese)
[Duskmourn: House of Horror]
Sold Out
Overlord of the Floodpits (Japan Showcase) (Japanese)
[Duskmourn: House of Horror]
Sold Out
Raiza the Storm Monarch
[FOTB-EN026 Ultimate Rare]
Sold Out
Dark Resonator
[BP02-EN067 Common]
Sold Out
Assault Dog
[DLCS-EN035 Common]
Sold Out
Ursine Monstrosity
[Duskmourn: House of Horror Commander]
Sold Out
Grave Squirmer
[SDGU-EN020 Common]
Sold Out
Dark Magician Girl
[MVP1-ENS56 Secret Rare]
Sold Out
Medallion of the Ice Barrier (Alternate Art)
[BLTR-EN098 Ultra Rare]
Sold Out
Skithiryx, the Blight Dragon Art Card
[March of the Machine Art Series]
Sold Out
Tendrils of Agony (2004)
[Secret Lair Drop Series]
Sold Out
Thorn of Amethyst (Retro Schematic) (Serialized)
[The Brothers' War Retro Artifacts]
Sold Out
Thorn of Amethyst (Retro Schematic) (Serialized)
[The Brothers' War Retro Artifacts]
Sold Out
