From Lord Rytheran's Journal Quest introduced in Foolish Ambition event. The seal is inside the chest inside the bunker at 65.6S 43.9W in Graveyard.

File:Icon RytheransMasterSeal.jpg Rytheran's Master Seal
This heavy, golden seal is moldy with grave dust and engraved with the runes of Dericost.
Value 0p
Burden 50
Special Properties Attuned, Bonded