This rings can be worn by the player or NPC. 3 Rings, craftable at a forge.   Most important ring, the Ring of Protection.  Avoid the curse.   Second ring, Ring of Creatures. Influences everything, except NPC.   Third ring, Ring of People. Influences all NPC, but no creatures.   The rings are using the SLEN effect Aphrodisia as long you or an NPC are wearing those.