The Demon Locator Spell was a spell that helped to locate the demonic energy in the area. The spell required an invocation to the goddess Thespia, a map of Sunnydale, candles, four crystals and a powder crushed in a mortar. When the potion was mixed, Thespia called and the powder was blown, it created a mist on the map over the parts where the demons were. It displayed different colors for different breeds.