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Need to tell that to Xavier before he breaks.

Well, using fighting language, Xavier kind of telegraphed that psychic probe, it's easier to deflect an attack when you know it's coming, providing you have the means to defend against it, which...

I don't see a problem/retcon. His being called "weak tk" just means that it takes a huge effort for him to muster enough of it to have a "strong" effect, like he did against Nimrod, and it'd probably...

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This was in Avengers Vs. X-Men #9, so he seems to do stuff like this and then die not long after lol