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. It also doubles the chance of getting rarer drops from slaying Revenants. It is also used in the sequel, Summer's End.

The ring allows entry through the aforementioned portals and entering some portals will give you some experience points. The ring will not teleport you if you have been 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 west to the spiritual portal used to travel to the Spirit Realm. The portal is located at the farm ruins north-east of the Wilderness Volcano, and north-west of the Clan Wars area.

Also, speaking to the Strange Old Man (Priest in Peril completed) at the entrance to the Barrows while wearing the ring makes him go crazy and allows for a few more lines of dialogue.

Trivia

 * This ring looks just like an Explorer's Ring 1, but with small stripes.
 * It also looks similar to the old ferocious ring.