[Tryfan]

No, it doesn't work that way. The movement phase you're referring to happens simultaneously but that just means you'll never catch an army by trying to move regularly to where it is. You have to get in front of it, or move to where it will be.

It's the same for everyone.

Only way to hit an army before it can move is to summon into it. That, or assassinate all its commanders so it doesn't go anywhere...

Since we're feeling a bit pretentious in the in-game messages, what's latin for "sorry about your prophet"?