No for your first two questions. For your third question, it does not have to have a base attack. For example, take a brown work glove that's scrolled with one 30% glove attack. You can use a chaos scroll on it to gain attack. However, let's say you have a facestompers, and the chaos scroll takes away your only two attack. You cannot regain it with another chaos scroll.
@Retalion What about the first cell!?!?!?!?
@Retalion What about the first cell!?!?!?!?

