Artisan's potion

The Artisan's potion is a one dose potion only available in the Dungeoneering skill. Using the potion boosts Smithing, Crafting, Fletching, Construction and Firemaking by 4 + 4% of levels.

It is made by adding Magebane and Red moss to a vial of water. This requires level 60 Herblore and grants 131 experience in Herblore. This potion can only be made in dungeons with complexity level 5+.

Reference

 * RuneScape Game Guide: Dungeoneering - Herblore Tables