Nature staff

The Nature staff is a magic weapon released with the dungeoneering skill, on 12 April 2010. It costs 12,500 Dungeoneering tokens. Players can store up to 1000 nature runes in it, and when used this way it has a 1/10 chance to save a nature rune.

Cost Analysis
The following is a comparison of the cost per cast of spells using Nature runes while using an elemental staff as opposed to using a Nature staff. The cost per cast when using the Nature staff is approximate and assumes that exactly 1 out of 10 nature runes are saved.