
The Elusive Jackalope |

Do you need line of effect to dismiss a spell?
A spell that depends on concentration is dismissible by its very nature, and dismissing it does not take an action, since all you have to do to end the spell is to stop concentrating on your turn.

james maissen |
Do you need line of effect to dismiss a spell?
That would be a grey area, but I would say in general that you would. But it would be an off-the-cuff answer.
I would also tie it to directing/redirecting a spell as it seems related.
Thus it seems reasonable to require line of effect to dismiss a spell in general.
-James

Chemlak |

Interestingly, I would say no, since the rules only require that you be in range. This allows (say) a Black Tentacles spell to be dismissed while the caster is behind a Wall of Force, which has significant tactical implications.
Having said that, I do agree with James that it is something of a grey area, and the GM's word is final.