Allomancy is one of the Metallic Arts. It allows you to ingest sixteen metals and alloys to 'burn' them to produce effects such as Enhanced Strength, Enhanced Senses, Metal Sensing and Manipulation, Precognition, etc. Every time you defeat a Parahuman/Parahuman equivalent you gain a bead of Atium that can last 45 seconds. This power can be blocked by aluminum. You also know the exact proportions of all the allomantic elements.