Tan Leather

Tan Leather is a Lunar spell which tans up to 5 hides in the player's inventory, with no extra gp cost like there would be with the normal process of tanning. However, in order to cast the spell, the player must have completed all of the easy, medium, and hard tasks of the Fremennik Diary.

With good timing, this tans around 8970 hides per hour, also giving the player ~146k Magic experience per hour and can be used as a good method of money making. The quest Lunar Diplomacy must also be completed to cast this spell.

As cowhide can be tanned into either soft leather or hard leather, it is possible to toggle between the two by right-clicking the spell icon.