Puffball

A character who casts puffball on a normal mushroom, truffle, or toadstool (up to 6 inches in diameter) transforms the fungus into a magical puffball, which the character may drop or throw. The DM should decide what type of roll, if any, is required to hit the target (Strength, Dexterity, etc.)

The puffball bursts upon landing, releasing a cloud of spores 10 feet in diameter. Those caught in the spore cloud must save vs. poison or suffer an attack of coughing and choking. Victims can make no attacks and lose all Dexterity bonuses to Armor Class and saving throws. The cloud dissipates in 1d3+1 rounds; residual effects still afflict characters one round after they escape the cloud or it fades.

The spell's effects do not affect undead or similar nonbreathing creatures. If no one throws (or drops) the missile by the time its duration expires, the enchantment is lost.

The caster sprinkles the material component over the fungus to be enchanted.

[Complete Druid's Handbook]

Druidic

Sphere: Plant
(Alteration)
Level: 1

Range: Touch
Components: V, S, M
Duration: 2 rounds/level of caster
Casting Time: 4
Area of Effect: 1 mushroom, etc.
Saving Throw: Special

Material Components: a pinch of ground puffball