Alright I have a question about the levels of spells.
In the second game play video - right before the character attacks a frost troll - he pulls up a menu of spells
such as:
Chain Lightning
lvl: Adept Cost: 148

Fire Storm 75 damage
lvl: Master Cost: 148

Flames
lvl: Novice Cost: 5 (per sec)

SO.. finally my question. How does the Novice, Adept and Master system work?
Is it like the custom weapons of Fallout 3 where you upgrade schematics to make the weapon better, do you learn the spell multiple times to make it better?
Or is it a use thing? the more you use the spell the more proficient you are and have more mastery?

Second Part
Whats the Perk of being a Master at a spell?
Cost less? more damage?