For the potion used to access the Dream World, see Marr vial.

A Marrentill potion (unf) is an unfinished potion made via the Herblore skill. Players make it by using a marrentill on a vial of water. It is used to create a potion of sealegs during Bone Voyage, along with two vodka.

It can be used to make:

Potion Ingredient Herblore Level Herblore Experience
Antipoison Unicorn horn dust 5 37.5

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