From DDO wiki
|Item Type||Jewelry / Ring|
|Race Absolutely Required||None|
|Location||Diplomatic Impunity, End chest|
|Description||A ring said to have been originally crafted for the hag queen Sora Katra. It makes the wearer glowingly charismatic, and allows him or her to sway others with words alone.|
The spell damage increase from the set bonus is a Equipment bonus, and does not stack with any other spell damage increase effect from items.