Reduced cadava potion

The reduced cadava potion, is a potion made in the quest "Making friends with My Arm".

The potion is used to pretend My Arm killed the Wise Old Man, an enemy of the trolls in Weiss.

This potion can be made during the quest by bringing 1 cadava berry to the apothecary in Varrock. Once the Wise Old Man drinks the potion he collapses and you put the Wise Old Man in a coffin to "prove" My Arm killed the Wise Old Man