Soul runes are the only conventional type of rune that cannot be crafted using a normal Runecrafting altar. However, images for soul talismans and soul tiaras exist, and upon gaining level 90 Runecrafting, a message used to be displayed telling the player that he/she could now craft soul runes. There is a soul rift in the Abyss and an obtain soul rune option on the wicked hood; however, they can not be used. In addition to this, a player can use Quick Chat to say the phrase "I'm going to craft rune: soul runes".
The Ourania Rune Altar allows runecrafters to craft a random selection of runes, including the soul rune. This altar gives double experience for each rune crafted, and some simple arithmetic suggests that the normal experience for crafting each soul rune would be 11xp.