Otyugh Swarm

Conjuration (Creation)
Level Pestilence 9
Components V, S
Casting Time 1 standard action
Range Medium (100 ft. + 10 ft./level)
Effect Three or more oryughs, no two of which are more than 30 ft. apart
Duration Seven days or seven months (D)
Saving Throw None
Spell Resistance No

Focusing your will on a digusting pile of refuse, you cause toothed and tentacled horrors to ruse up and stalk about at your command.

Otyugh swarm creates otyughs from a large collection of refuse and filth, such as a sewer or cesspool. You can choose to create 3d4 ordinary otyughs (MM 204) or 1d3+1 Hude otyughs with 15 HD (MM 292)). The otyughs willingly aid you in combat or battle, perform a specific mission, or serve as bodyguards. They remain with you for seven days unless you dismiss them. If the otyughs are created only for guard duty, the duration of the spell is seven months. In this case, the otyughs must be ordered to guard only a specific site or location. Otyughs summoned to guard duty cannot move outside the spell's range.

You must create the otyugh in an area containing at least 6,000 pounds of sewage, refuse, or offal. After you cast the spell, otyughs not summoned for guard duty can leave the area of offal at your command.

(SpC page 152)