Level: Druid 1, Ranger 2
Components: V, S, DF
Casting Time: 1 standard action
Range: Medium (100 ft. + 10 ft./level)
Area: 10-ft.-radius spread
Duration: 1 minute/level
Saving Throw: Fortitude partial; see text
Spell Resistance: No
The ground at which you point erupts with countless puffball mushrooms.
You cause the ground to become thick with spore-ridden fungus. The area affected by this spell becomes difficult terrain. Entering a square of difficult terrain costs 2 squares of movement, and creatures cannot charge or run through such squares. The uneven surface created by this spell also increases the DCs of Balance and Tumble checks by 5 and the DC of Move Silently checks by 2.
In addition, any creature that enters a square affected by this spell bursts several mushrooms, causing their choking spores to fill the air. The spores render the creature sickened for 1 round (Fortitude negates). Treat the spore cloud as an inhaled poison for the purpose of bonuses on the save or immunity to poison. Entering more than one affected square during a turn doesn’t force multiple saves.
You can cast spore field on any type of ground or flooring, regardless of the material that comprises it.
Source: Complete Scoundrel, page 104.