Mourning Song wrote:
Also the main difference between "concentrating on a target" with spells
is that if you consider the necessary magic. You're looking at someone,
focusing your magical energy at them so you would stop focusing quickly
if they left the room. However if you're reading a scroll, you'd have to
continually glance up (no matter the fact that scrolls are instant). The
power itself would be lesser as would be your focus on the target. Hence
why you wouldn't quit reading if they darted out.
It does infact matter that scrolls are instant, because even if everyone has their own preconcieved notion of how fantastical characters read spells off pieces of paper, mechanics wise scrolls fire immediately, if you're target is in the room when the command is registered the scroll will cast the spell at them.
The problem exists in the fact that scrolls and wands will default to a null target(to say one that doesn't exist), and waste a scroll/wand charge anyways, if there isn't anything to recite/zap it on. I don't really care how scrolls are read or wands are zapped, however it is neither of them have any concentration time what-so-ever, the problem that exists is simply that you can zap/recite them on non-existant targets.
Just to bring up Pushing40's example again because it was a good one:
<look>
You see a barren room, nobody but yourself for hundreds of miles.
<recite napoleon>
You recite a small scroll of colorspray
That's the problem, Napoleon wasn't in that room, in fact he died some 187 years previous, yet you're still able to waste wand charges/scrolls trying to recite/zap at imaginary targets.
You should instead get the "They aren't here" message, like any other skill gets when trying an action on an unavailable target.