Hardened Wood

Hardened Wood is an Reforge Stone which can apply the Stiff reforge to a fishing rod.

Obtaining
Hardened Wood is sold by Jake for 15,000 coins when you bring an Oasis Sheep to his house on the mountain.

Requirements
Hardened Wood requires level XII (12) to use and can only be applied to fishing rods.

Trivia

 * The resulted reforge, Stiff, is used as a dirty joke that you should not know.