Fungal Construction

At-will, standard, ranged; you conjure a fungal growth in a shape you desire, within the bounds of a medium object. This could be a bridge up to 10 feet long, a wall 10x10 feet that is 2 feet thick, a 40-foot ladder or ramp, a human-sized and weighted dummy, etc. The material is as strong as soft wood, with hit points equal to a heavy damage roll. It does not require concentration, but is in fact permanent, at least under the consideration that it is made of living fungus. If the fungus cannot feed, it will slowly dessicate and die; this may not necessarily hinder an object such as a bridge. If the fungus can feed, it will gradually bloom, spawning mushrooms and spores, regenerating damage slowly, etc.