So, for all that don't know, Rocklops is an Item Card that hits the enemy and puts up two traps depending on the main item's stats. I thought to myself, "If the item card puts up a storm and life trap, but the actual item card is a life spell, why not make the spell both usable (with power pips) by both life and storm users?"
So then I thought that maybe future spells (or maybe some current spells) could be usable by two schools? It seems like a unique way to use some cards that you received in a pack, bosses, or some TCs. And maybe there could be some spells that could be used with power pips for all schools? (Of course, it wouldn't be a very great one, but it would seem divine.)
Also note that Mastery Amulets wouldn't be needed for them, but if you had a storm mastery (and if you weren't a Life wizard), you would be able to use the Rocklops mentioned above.