Mana Compass

Source book: Cutting Aces

Superficially resembling a standard compass, on closer inspection the needle is glass rather than metal. Embedded within one end of the needle is an extremely tiny droplet of orichalcum. This compass, simply called a mana compass, always points toward the largest nearby active magical source. They are rare and sought after by mundane researchers of magical theory and phenomena. The compass points to a mana source if it is within a number of meters equal to the Force of a spell, manifested spirit, focus, or other similar effect. Magicians with the Masking metamagic concealing their owner are not detected. It does not point to mana sources on the astral plane. Extremely strong magical effects such as an alchera or mana storm cause the needle of the compass to spin wildly.