Arcana covers information about magic and spellcasting, along with technology based on or powered by magic.
Locate and Identify Magical Effects
As a move action, you may locate magical effects and magic items on a creature or square within your line of sight out to [Close] range by making an Arcana check (DC 15 + the level of the creature that created the effect or is attuned to the item). If you succeed, you may also use that check to identify one magical effect or magic item you have located. For every 5 points by which your Arcana check exceeds the DC, you may identify another located effect or item with an equal or lower DC. You cannot use this skill magical effects with the [Figment] or [Glamer] descriptor.
Identify Located Effects
As a swift action, you can identify magical effects and magic items you have located on a creature or square within your line of sight by making a successful Arcana check (DC 10 + the level of the creature that created the effect or is attuned to the item). Effects that can only be activated by [Legendary] creatures add +2 to the DC. Apply this check to each effect or item being identified but determine the results separately.