Walk Through Wood

Regular 
Enables the subject to pass through solid wood (dead or alive) as if it were air. It does not open a passage so that others can follow, nor does it reveal what is on the other side . . . The subject should hold his breath, as the spell does not supply any air! 
Should the spell end before the subject regains the open air, he is buried in wood. He is not automatically harmed, but suffocates if he cannot escape.

Duration: 1 second. 
Cost: 3 to cast. 2 to maintain. 
Prerequisite: Walk Through Plants.

Item 
Cloak of plant material.  
Energy cost to create: 500.