The Magic essence plays a major part in the quest Fairytale II - Cure a Queen. The potion requires level 57 Herblore and rewards 130 experience per potion made. The potion is made by adding a starflower to a vial of water and then adding gorak claw powder. (The powder is made by using a pestle and mortar on a set of gorak claws.)
A player drinking a dose of magic essence potion receives a temporary +3 boost to Magic. The primary and secondary ingredients for this potion require partial completion of A Fairy Tale Part II and are untradeable. Gorak claws are frequently dropped from goraks, which can be found either in a separate dimension using fairy ring code DIR, or in the God Wars Dungeon. Starflowers are found on another dimension, the Cosmic Plane, which can be reached via Fairy Ring code CKP. The flowers take about 2–5 minutes to start growing after the player arrives on the plane and require level 49 Farming to be picked.
The magic essence potion is untradeable. It can be made into magic ess. mix by adding caviar, if the player has had sufficient Barbarian Training. The mix is tradeable, but will not cure the Queen.