[@lydyb]
I'm not gonna lie I'm a little disappointed that your not a whovian. Doctor who is bae.
and yea basically. A) while AntiMatter is very powerful, it is the opposite of creation. the opposite of stability. it does have many chances to back fire, depending on the wielder.
B)Kyle personality is what mainly keeps his powers in check. the reason why kyle is a slow healer and bad immune system is because his powers effect him on a very deep level. he wants to not kill, and is hesistant to use greats amounts of strength so his powers will automatically be curved. 
C)yes he has the potential to be OP I wanna ask that you trust me not to be ever. If you don't that's fine I can hange it but my character wont OP mainly because Kyle doesn't wanna to be all powerful.