So here's an ability that sounds epic at first until its weakness is revealed. Someone can deliver punches that obliterates all of someone's atoms that come into contact with it no matter how powerful. The downside is that it only obliterates those specific atoms and it stops his momentum entirely as all the force goes into them.

In short, one punch would obliterated a single layer of atoms the size of his fist and his fist would shatter from the change of momentum stopping at a single atoms distance. XD