Iggwilv's Lightning Cage

This spell is a variant of the 7th-level wizard spell forcecage, and it is identical to that spell except as follows:

First, the “bars” of force energy which form the cage are electrified. Any creature, whether inside or outside, who makes contact with the electrified bars or touches them with an object composed of metal or other conductive material, must save vs. spells or suffer 10d6+10 hp damage. A successful save reduces this damage by half, but the lightning cage is not dispelled, nor are its electrical effects.

Second, the floor of the lightning cage is composed of a solid “sheet” of force energy equal to a wall of force, but it is charged only on its outside surface.

Third, unlike a forcecage, Iggwilv's lightning cage cannot be altered to form a solid cube of electrified walls of force.

Finally, the lightning cage does not require the ritual drawing of a square with powdered diamond as is necessary with a forcecage, but it does require a material component. This material component consists of a “wand” of amber (worth 100 gp), tipped with a transparent gemstone worth at least 1,000 gp.