Guphandera Argoros

Guphandera Argoros (クファンテラ＝アーゴロス) is an undead dragon that is said to inhabit the New World.

Background
It's stated that this dragon lives on a mountain of the dead.

The Craftsman of Dwarf Arc
During his encounter with Ainz Ooal Gown, Hejinmal mentally lists Guphandera Argoros as among the various powerful undead creatures to have been recorded in legends.

Abilities and Powers
Nothing is known about this dragon's abilities other than it being able to use psychic-type magic.