Air rune (The Slug Menace)

An Air rune is a special type of air rune used during the Slug Menace quest. It is made by using a blank air rune on an Air altar in the normal way and is used to unlock a mysterious door in the newly discovered shrine beneath Witchaven. In order to unlock the door the player must also have made an special earth rune, a special fire rune, a special mind rune and a special water rune