Seers (also called soothsayers) can see premonitions. They care considered the weakest of the guilds due to their inability to decipher their visions in time to do any good.
Seers can see events that have already occured that they didn't personally see. They can also see the future. Sadly, their visions are cloudy and difficult to decipher. They use mirrors and other kinds of objects to help clarify their visions.
- Blaise Highbourne