From all the responses I've read it would seem that people don't think line of effect applies to this spell. How does this spell ignore the line of effect rules?
Worse - by the wording, you don't just need a line of effect, you need a line of
sight.
The target is "one living creature".
P148 tells us that for a targeted spell "you must be able to see or touch the target, and you must specifically choose that target".
However...
...
Sending, for example, has a target of "one creature". And while it will work acorss planes, even (sometimes), the spell doesn't explicitly state that the normal targetting rules don't apply.
A spell that will let you send a message to someone, wherever they are, even on another plane... as long as you can see them... seems sort of pointless. By the rules, it's how it reads. Does it make sense? Up for debate.
Same goes with
Nightmare, I think. If you need a line of sight, then you can
see whether or not the person is asleep. No need for this sense sleep, trance, etc rigmarole.
"Range : Unlimited" says it can reach anywhere on the same plane of existence. I'd be inclined to interept that liberally when it comes to line of effect.
-Hyp.