Spin Flax is a Lunar spell. When cast, it allows players to spin flax in their inventory into bowstrings. Each cast of the spell will spin 5 flax. When you cast the spell, it will automatically be cast enough times to spin all of the flax in your inventory. A full inventory of 25 flax takes around 7 seconds to spin. Dream Mentor must be completed to cast this spell.
For every 5 bowstrings made using the spell, players will make a net profit of 65 with only runes or 310 with a staff of air equipped.