This method involves the General store in the nearby Tai Bwo Wannai village just north west of the altar. This process is simple and does not require the use of a bank. Initially, have all the essence that you want to runecraft in your inventory in noted form. You will also need a certain amount of gp, roughly 6 gp per essence. You sell some essences to the General store because you have it in noted form and can't runecraft it. Then you buy it back from the General store and it is un-noted so you can now walk to the altar and runecraft your Natures.

 

 

 

The price has greatly increased, and is now well over 100 gp per essence. This means that this is no longer such a cost effective way of making nats

I've edited that part out of the guide, thanks for your submission.