Quote Originally Posted by nedz View Post
You can refluff most spells as being in almost any school.
In D&D it's fluff backed up by custom spell research. In that game it was part and parcel of the magic system and had real mechanical consequences. SPells that took more set-up were easier to cast (it was skill based casting with a fatigue/wounds limiter) or were more powerful. Altering parameters of the spell could change the defence roll from agility to endurance or willpower.