So Basically, your wizard casts the spell and a book with your schools emblem appears in the middle and it begins to play ravenwood music, then it opens and tones of fire and fire creatures and characters(For Example) come out of the book and attack the enemy with the force of ones school.
This goes for all schools and could be almost a cool memory spell that makes your remember your time in raven wood.
Dylan LegendSmith, Prodigious Necromancer