Jennica's ring

Jennica's ring is one of the rewards given after completing the Wilderness quest, Spirit of Summer. This ring provides no stat bonuses. It is used to access portals to the parallel spirit-world. Summer (from the Spirit of Summer quest) says it makes Revenants "more generous in their drops". It is also used in the sequel, Summer's End.

The ring allows entry through the aforementioned portals if the player is teleblocked. However, since the parallel realms are not in the wilderness, one can teleport from there under any other situation. To use the ring, stand directly on top of or adjacent to the portal with the ring equipped and operate it.

If the ring is lost, it may be obtained by searching the rubble next to the spiritual portal used to travel to the Spirit Realm. The portal is located at the farm ruins north-east of Bounty Hunter area, and north-west of the Clan Wars area.

Also, speaking to the Strange Old Man at the barrows while wearing the ring makes him go crazy and allows for a few more lines of dialog. It looks remarkably like the Explorer's Ring 1.