Stone of Controlling Earth Elementals

A stone of this nature is typically an oddly shaped bit of roughly polished rock. The possessor of such a stone need but utter a few words of summoning, and a Huge earth elemental comes to the summoner. The summoning words require 1 full round to speak, and in all ways the stone functions as the summon monster VII spell. (If sand or rough, unhewn stone is the summoning medium, a Large earth elemental comes instead, and the stone functions as the summon monster VI spell.) The elemental appears in 1d4 rounds. Only one elemental can be summoned at a time. A new elemental requires a new patch of earth or stone, which cannot be accessed until after the first elemental disappears (is dispelled, dismissed, or slain).

Prerequisites: Craft Wondrous Item, summon monster VI, summon monster VII

Cost to Create: 50,000 gp, 4,000 XP, 100 days.

Source: Dungeon Master’s Guide (version 3.5), page 267.