Goblin potion

Goblin potions also known as Goblin transmogrification potions are made by using toadflax with pharmakos berries for the Land of the Goblins quest. The potion transforms the player into a goblin, though it will wear off if the player wears something that isn't goblin related or if the player attacks something.

Make-over Mage during the quest: ''You should only drink it in the area you're going to need it, so you don't waste it. It will reverse itself if you are in direct sunlight or if you perform a strenous activity like fighting. It will also reverse itself if you try to wear anything that goblins don't normally wear.''

Drinking the potion in the wrong area: There is no point in drinking the potion until you are near the entrance to the secret goblin temple.