Wall of iron

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

Effect
When cast, this spell created a wall of iron. This was was vertical and always flat, and was often used to block passages or repair a wall. The thickness of the wall was determined by the caster's skill level. The wall could not be summoned if the space was already occupied by a creature or an item. The spell could also be used as a weapon. In this case, a caster summoned the wall in an area where it was not supported on any side. The wall was then pushed and if the timing was correct, would crush any creature on the other side. The wall was vulnerable to the elements, and a powerful creature was able to breach the wall.

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 and was originally called Mavin's iron wall. This spell was found in the Book of Bats.