Useless but fun magic Items

[Erik Vale]

Once you know the effect it becomes a ring of teleportation - you just teleport to a location twice as far away as your intended destination

But if the ring can actually tell you want to land at half way, or exactly where you want to land, it just puts you half way there, preventing deliberate overshoot cheese.

My item:
Stone of Flaring Light: Acts as a stone of Alarm, however instead of waking people with a high pitched sound and waking people up, it hits everyone in the area with a Flare spell (as per flare, caster level varies based on the stone). The spell has only a 50% chance of waking a sleeping person.

It will make sure the guy on watch notices people have entered, but you still need a guy on watch.