Belt of the Shadow Dragon

This belt is made of Shadowsilk and is thus invisible in the light. It has the following qualities.
*+6 enchantment bonus to strength, constitution, and charisma.
*When the appropriate command word is whispered, the belt summons a medium shadow elemental to do the weilder's bidding. The elemental remains for 30 minutes then vanishes, but can be called again immediately. If the elemental is killed, a new one can be called.
Strong Transmutation; CL 20; Craft Wondrous Item, bull's strength, eagle's splendor, bear's endurance, summon monster v; 198,000