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Message: <blockquote data-quote="FireLance" data-source="post: 1361867" data-attributes="member: 3424">I've always interpreted the interaction between [Light] and [Darkness] spells to be as follows:Counter: A [Light] or [Darkness] spell can be used with the Counterspell action to automatically negate a spell of the opposite type of the same or lower level.  This requires both spells to be cast in the same round.Dispel: A [Light] or [Darkness] spell can be used to end the duration of a spell of the opposite type of the same level or lower, in a manner similar to a targeted dispel magic.  The decision to use the spell to dispel an existing spell must be made when it is cast.Temporary Negation: Any number of pre-cast [Light] and [Darkness] spells create an area where prevailing light conditions exist.  This is based on the general rule that spells with the same effect do not stack.  Hence, it does not matter whether there are multiple [Darkness] spells or a Heightened [Light] spell - the magical effects all cancel out.Example: A party with a wizard and a druid who have prepared daylight spells is underground when it encounters a drow cleric who has prepared a darkness spell.The party's light source is a torch with light cast on it.  The drow cleric attempts to cast darkness.  If he succeeds, the effects of the two spells cancel each other out and the prevailing light conditions would apply (darkness, since this is underground).  Fortunately, the party wizard manages to counterspell the darkness with his daylight before it is even cast, and the party still has light.The drow cleric then flees to an room under the effect of a pre-cast deeper darkness spell.  The party pursues, and the overlapping effects of the light and deeper darkness spells leave them in darkness.  The druid then casts his daylight spell to dispel the deeper darkness and the party has light again.  If he had only cast it as normal, the party would still be in darkness as the deeper darkness would have negated the effect of both the daylight and light spells.</blockquote>

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