Transmute Metal to Wood

Make a spell card:
NameTransmute Metal to Wood
SchoolTransmutation
LevelArc 7, Drd 7, Metal 7, Wuj 7
ComponentsV, S, DF
Casting Time1 standard action
Recharge Time6 hours
RangeLong (400 ft. + 40 ft./level)
AreaAll metal objects within a 40-ft.-radius burst
DurationInstantaneous
Saving ThrowNone
Spell ResistanceYes (object); see text