This bronze spike sparks with static electricity.

A stunning spike becomes invisible 1 round after you plant it firmly in the ground. Thereafter, as soon as any creature comes within 10 feet of it, the spike bursts into fragments, stunning all creatures in a 20-foot radius for 1 round (Will DC 20 negates). This effect destroys the spike.
During the round that a stunning spike remains visible after being planted, any creature can safely remove it from the ground (a standard action) to render it harmless and ready for reuse.

Prerequisites: Craft Wondrous Item, symbol of stunning.
Cost to Create: 4,500 gp, 360 XP, 9 days.