Actually, seeing as Earth would not be [b][i]your[/i][/b] dimension (Or would it? Hm...), I can easily destroy you from outside of your dimension IF I needed to...
English
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alright, fight me in [i]my[/i] dimension, and once you enter it, all your powers are moot, and you can only change it's origin, not what it can or cannot do, you can make yourself immune to anything that I do, but you'd have to be quick before i make your powers moot in my dimension.