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From Pathfinder #193: Mantle of Gold, which isn't enabled.

Mycoweave Shield (Greater)

ITEM 8
Price 40 gp
Bulk 1
AC Bonus +2
Hardness 4
HP 64
BT 32

This shield is grown entirely of specially treated fungi, giving it the appearance of a frilly disc. The shield has Hardness 4, HP 64, and BT 32.

When left atop at least 1 bulk of organic matter, it gains fast healing 1; after 10 minutes 1 Bulk of the organic matter has been consumed by the shield. This shield doubles its hardness against bludgeoning, electricity, and sonic damage.

Activate manipulate
Trigger The shield is broken

Effect The shield spews spores into one adjacent square, dealing 2d6 persistent poison damage to all creatures in within it; a successful DC 24 Fortitude save negates the damage.

Craft Requirements You are trained in Nature, and can cast a fungus spell or are fungus.
Pathfinder #193: Mantle of GoldOGL