Crystal Anchor of Alertness

This lightweight shaft of transparent crystal is 4 feet long and tapers to a point on both ends.

When planted in the ground and activated, a crystal anchor of alertness burns with clear light (providing illumination as a lantern). In addition, your allies gain a +5 bonus on Listen and Spot checks as long as they remain within 30 feet of the anchor.

This effect lasts for 1 hour, and the anchor functions three times per day.

Prerequisites: Craft Wondrous Item, alarm or zone of alertness {CP 104}.

Cost to Create: 1,250 gp, 100 XP, 3 days.

Source: Magic Item Compendium, page 155.