The Hunter Potion is a buff potion which grants the Hunterbuff when consumed. The buff shows the location of enemies, critters, and undiscovered NPCs on the screen by highlighting them in red (enemies) or green (critters and NPCs). This lasts for 8 minutes, but can be canceled at any time by right-clicking the icon (), by selecting the icon and canceling it in the equipment menu (), by double-tapping the buff icon (), or by canceling the buff from the buffs screen (). Although the creatures glow, they do not emit any light to the surrounding area.
The Lifeform Analyzer informs the player of the presence of nearby rare creatures. This helps determining when a Hunter Potion is worth consuming.
The Hunter Potion has great utility when fighting enemies that move through blocks, such as burrowing worm enemies like the Eater of Worlds, or Man Eaters and Angry Trappers. It makes it possible to see them when they would otherwise be hardly visible, and anticipate their attacks.
Hunter Potions can also be used to locate pocket caves underground by revealing enemies that spawn inside them.
Certain enemies such as Wraiths will not be made any more visible by this potion.