Prayer potions require one ranarr weed, one snape grass, and level 38 herblore to mix. Gives 87.5 herblore experience when finished. This potion restores one third of your overall prayer level when drunk. Although, when holding a holy wrench in your inventory, you will restore more of your prayer. The calculation for how many Prayer points that are restored is 7+(X/4) X being the players Prayer level.