Cinder Wall

The  is a naturally-occurring wall type found in the Cavern layer at depth where lava replaces water (but not in the Underworld). As a natural wall it can be destroyed with a Hammer but drops nothing, nor does it stop enemies from spawning or is usable for housing.

On the, it can be crafted from Hellstone, at a Work Bench near Ecto Mist similar to many otherwise naturally-occurring background walls, in which case it can be used like other craftable walls.