|Title||Deadly Dark Beast|
|Type||Ancient Mythical Animal|
|Cards||(Ja:) St-890, Bo-753|
AncientSphinxmon is an Ancient Mythical Animal Digimon. Possessing the attribute of "Darkness", it is one of the Ten Legendary Warriors that saved the ancient Digital World. A Mega who existed only in the distant past, it is set at the opposite extreme to AncientGarurumon as a being born from darkness. It rules over the destruction and annihilation of all existing or living things, and is feared as the "Deadly Dark Beast". Its abilities were later passed on to the "Mythical Animal" and "Demon Beast Digimon".
- Dark Blast: Fires a laser beam alongside a roar.
- Necro Eclipse: Attacks with the ultimate annihilation technique which completely envelops the opponent in the darkness of death.
- AncientSphinkmon (エンシェントスフィンクモン)
Official romanization given by the Digimon Reference Book and used in most Japanese media.
- AncientSphinxmon (エンシェントスフィンクスモン)
Digimon Battle Spirit 2
D-Tector 2.0 and 3.0
Digimon Story: Lost Evolution
AncientSphinxmon is #280, and is a Mega-level, MP-type, Dark-species Digimon with a resistance to the Dark and Earth elements and a weakness to the Holy and Water elements. It possesses the Death Barrier, Sleep Barrier, Assassin's Arm, and Stun Barrier traits.
It dwells in the Thriller Ruins. When defeated, it can drop the debug plate for AncientSphinxmon or the Spirit of Darkness.
AncientSphinxmon digivolves from SkullBaluchimon. In order to digivolve or degenerate into SkullBaluchimon, your Digimon must be at least level 49, but only once you have revived AncientSphinxmon, befriended Pharaohmon and Anubismon, and input the Spirit of Darkness.
It can be hatched from the Mummymon DigiEgg.
Digimon Story: Super Xros Wars Red and Blue
AncientSphinxmon is a Mega-level Digimon. It can be digifused during battle from Nefertimon, SkullScorpionmon, SkullBaluchimon, and Digitamamon, and will attack with "Necro Eclipse". It can also be formed from a DigiMelody.