Wall of iron

Wall of iron was a conjuration spell that created a dense iron barrier.

Effect
The caster caused a flat, vertical iron wall to spring into being. This wall could have been used to seal off a passage or close a breach, for the wall would insert itself into any surrounding nonliving material, if its area was sufficient to do so. The wall could not be conjured so that it occupied the same space as a creature or another object. It must always have been a flat plane, though one could have shaped its edges to fit the available space.

The thickness of the wall increased with the power of the caster. The mage was able to double the wall’s area by halving its thickness. Exceptionally strong creatures were able to break through the wall, as well as push it over.

If the caster desired, the wall could be created vertically, resting on a flat surface but not attached to the surface, so that it could be tipped over to fall on and crush the creatures beneath it. If no force was exerted on the wall from a particular side, it could tip in either direction. Creatures large and small could be crushed by the large iron wall, but not creatures that were huge, such as hydras.

Like any iron wall, the conjured wall was subject to rust, perforation, and other natural phenomena.

Components
The spell required verbal, somatic, and material components. The material components that were needed were a small piece of sheet iron, as well as gold dust worth 50 gp.

History
The spell was attributed to Netherese arcanist Mavin in -587 DR and was originally called Mavin's iron wall.