Many things have supernatural effects in The Witcher. Potions grant Geralt special abilities, oils and other blade enhancements grant his weapons increased effectiveness, rituals performed at places of power also allow Geralt to enhance certain abilities or cleanse himself of other adverse effects and, of course, signs have effects as well, some on Geralt and some on his opponents.
These effects are usually shown on the ring which surrounds the witcher medallion in the game interface. To see specific information an active effect, move the cursor over the effect icon and this will display an information box with the details of the effect and duration.
