This is the spell (as most people know).
The saving throw section makes me confused. It is a powerful spell and the description reads as:
The spell can be centred on a creature, and the effect then radiates from the creature and moves as it moves. An unwilling creature can attempt a Will save to negate the spell and can use spell resistance, if any.
The problem is, when must the target creatures who are in the spell area make saving throws?
Description sounds like... "if a creature is selected as the centre (target) of the spell then he can use ST and SR. If he is not the centre (target), but just within the spell area, then he is silenced without any chance for ST or SR (because the is not the target, but in a place where the spell has effect)." My players got into an argument over how this spell must be evaluated. The above condition doesn't sound logical since (according to that description) any caster without level distinction will suffer from the spell and casting the spell on a foe is meaningless (while you can cast it on something that will not receive any ST or SR)
So, do all unwilling creatures in the area receive ST and SR or just the centred creature (if any)?