and what does soulfire do exactly? "makes spells more powerful" i know, but how much? does it mean that when he goes to light a candle he instead destroys the entire building? how has it been used in the past and what kind of power boost does it give? is there any limitation to how much he can use it, or is it just something that's always on and making him more powerful?
Power boost is a big deal. He has to activate it, and it weakens him to use.
also, what were the circumstances that led him to use the gravity attack? was it some great desperation attack? or has he just not had an occasion to use it again?
He hasn't had the opportunity to use it again; he just used it to open up his fight with the Red Court.
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"As the size of an explosion increases, the number of social situations it is incapable of solving approaches zero." -Vaarsuvius, Order of the Stick