[@Tiggas] 1. There's manipulating magic and conjuring magic when it comes to elements. Manipulation means it comes from somewhere, conjuring means it comes from another realm. Conjuring is the advanced form of magic. There are specific elements you can use, but feel free to use whatever you want.
2. It can work however you want your character's detection to work. While I added certain traits to each bloodline you can use it depending on your taste.