I went through the trouble of getting spellbreaker just to see if tolfdir would accept it as a ward in his little demonstration.

Tolfdir: are you at all familiar with wards?

Me:be right back

-two days later-

Me:yes i already know that spell

Tolfdir: stand right over there

Me: *raises shield*

*tolfdir throws firebolt at me*

Tolfdir:excellent!

-I also plattered my way into the ebony blade room at level one and escaped.