Ashenfall is the birthplace of runecrafting. When Guthix settled here, he discovered the strange anima pouring out of the ground, different strands of magic resonating with certain concepts and natural laws.
This potion lets you see the world as he did, just for a while. You can spot the colourful flows of anima as they shimmer in the air and you learn how better to trap them in the rune essence, creating the potential for future magic.