Ok, a question.
Null's nullifying powers are not new in the world of X-men concept wise (I definitely remember power dampening collars in the old cartoon). Was there ever any explanation how the mutant power nullification works in comics or cartoons? I mean mutants have different powers and different power levels but do they have some similar source? Mana pool? Chi?). Do they have some single general trait that unites them? Because logic-wise, I doubt that Storm's power to control weather has the same biological origin as, for example, Logan's healing factor.
Or it's the good ol' "It just works"?