THe Coif of Rithartep

[GetFirstPC]

Helmet from lowerdark quest crypt of Rithartep in the void.
It can be used without other parts of RIthartep gear though descriptions says.

"Such is working upon this item, it may only be used by one skilled in arcane arts, in combination with other Artifacts of Rithartep"

I thik it is part of set but isnt flagged like one.