here are some ideas i came up with for Knight's Probability Manipulations Limitations.. dont have to use them or even read them, just i had another RP that i was in, that my power in it would have been considered OP big time.  anyway, these are just some helpful ideas that came to mind.  and really in the end, im with Gisk, Knight might have his own idea that we cant think of

May be connected to emotions.
May be limited on how many times in a certain period it can be used.
May require exact measurements of probability.
May be limited to causing or preventing likely/unlikely things happening.

Limited to things that are possible i.e. the possibility of a given event must be above 0% to cause it and less than 100% to prevent it (in certain cases, the probability of a given event might also need to be above 0% to cause it and less than 100% to prevent it) and/or to manipulate a given event; can't make the impossible happen and can't prevent the absolute from happening (e.g. cannot make a world in which a given thing exists and does not exists in the same sense at the same time); can at most make the highly unlikely happen and/or prevent the highly likely from happening. In other words, this power is limited by causality, logic, reality, and truth.

Effort/strength required may be inversely proportional to the likelihood of the event happening (harder to make rarer things happen). 

just some helpful ideas, and i like the power, it kinda reminds me of something from an old tv show i use to watch called John Doe.  he was using a math, and created a formula to help him win at the horse races, and it was winning tons of money, til on one, the jockey fell off and he said. "the only sure thing is that there are no sure things" that kinda fits here, the only sure thing in this world, is there are no sure things"  *shrugs* just my thoughts and two cents.. you all can go back to ignoring me now if you want..lol