The Strong naturalist's potion is a one dose potion only available in the Dungeoneering skill. Using the potion boosts Cooking, Farming, Herblore and Runecrafting by 6 + 6% of the player's level in the respective skills. For levels 1-16, 17-33, 34-49, 50-66, 67-83 and 84-99 the bonus is 6, 7, 8, 9, 10 and 11, respectively.
It is made by adding Winter's grip and Misshapen claw to a Vial of water. This requires level 96 Herblore and grants 279 experience in that skill. This potion can only be made in dungeons with complexity level ≥5.
See also
fi:Strong naturalist's potion