DSA is the best pen and paper system because a) Al'Anfa sea war mages academy with ignisphaero fierball as Home Spell 2) ignisphaero is the most monstrously impractical spell because you almost never want to set an entire area on fire except, well, if you're on a boat and burning a different boat 3) I wasn't joking about casting it once before you kind of have to start using your own blood as mana. but then, it's not a "cast it more than once" type spell anyways