Shadow Summoning

This spell is similar to the 5th-level spell summon shadow, with two important differences. First, the shadows appear 1d8 rounds after the spell is cast instead of at once. Second, 1d6+1 shadows appear-the actual number varies from casting to casting, and is not related to the caster's level. The shadows are under the control of the spellcaster and attack his enemies on command. They appear within a 10-foot radius when summoned, but can move freely thereafter. The shadows remain until slain, turned, or the spell's duration expires. Shadows are described in the Monstrous Manual' Tome.

The material component is a crushed black opal, worth at least 50 gp.