Carpenter (Metamagic)

Any spell that creates or manipulates non-living wood is cast as if you were two levels higher.

Prerequisite(s): Ability to cast wood shape.

Benefit: Whenever you cast a spell that alters, creates, magically enhances or manipulates wood or a wooden object, you cast the spell at your current level plus two. To qualify for the benefits of this feat, the spell cannot be cast on any non-wooden material.

Furthermore, the spell cannot affect any type of living wood such as a treant or a living tree. Spells that fall under these restrictions include liveoak, speak with plants, tree shape and tree stride. Examples of spells affected by this feat include changestaff, ironwood and warp wood.