Technically, you can use your impervious roll for an incapacitate attack but it does you no good. Even if you are successful you simply reduce the damage dealt to 0 (which it was to begin with assuming there is no enhancement) and you are still hit (hence the token goes on and could create pushing damage which can't be avoided).

So in the other scenario, you get to roll impervious any time the character takes damage (0 or more) but you can only reduce the damage dealt. Amazo could roll to reduce the damage to 0 (and would reduce it by 2 no matter what) but couldn't avoid being hit (and the token would be put on him).

With MC, since it's no damage the character is never being dealt damage so impervious is useless there.

Interesting thanks I think the new ruling is more in "flavor" of what Impervious should be. Basically saying you can hit me all you want doesn't mean that it is going to hurt me.

so if a character is incapacitating, but happens to be adjacent to his enhacement guys hedoes damage?

If he is incapacitating using a ranged attack (enhancement only works for ranged attacks) then yes, you can enhance up the damage dealt. This does not work for "no damage" attacks such as mind control (and others).

Right - Incapacitate reduces your damage to zero, but Shield or Enhance can add damage to it. Perplex, before anyone asks, cannot, because Perplex affects the characters damage before the incapacitate, and thus the damage is still reduced to zero.