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From Pathfinder Howl of the Wild, which isn't enabled.

Wolliped Fleece

ITEM 1
Price 4 gp
Usage held in 1 hand
Bulk —
Category catalyst

Activate Cast a Spell (add one action)

A small bundle of wolliped fleece contains the memory of winter snows. Adding this catalyst to a casting of Chilling Spray coats all squares within the area of effect with a thin layer of ice. These squares become difficult terrain until the beginning of your next turn.

Pathfinder Howl of the WildORC