Object 'Kahl's ring of Vengeance' is infused with your magic...
It is a level 50 armor, weight 2.
Locations it can be worn: finger
Special properties: dark evil magic
Classes allowed: none
Genres allowed: sorcerer rogue fighter aberrant
Alignments allowed: evil good
This item has a gold value of 0.
Armor class is 17.
Affects mana by 35.
Affects hp by 35.
Affects damage roll by 4.
Affects strength by -1.
Affects dexterity by 1.

Notes:

This item is OOG, kind of. To make it you need to give the sleeves of Kahl and a blackened shard named "Infinity" to Kahl, but both of these items are now OOG. The prog to make the ring still works if you really want one, but the two requisite items are worth more in any case.