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→Lengthened Spellcasting: clarity
There are two primary exceptions to this rule, [[SRD:Spells|spells]] from the [[SRD:Healing_Subschool|Conjuration (Healing)]] school, and [[SRD:Spells|spells]] with an [[SRD:Duration_(Spell_Descriptor)#Instantaneous|Instantaneous duration]] whose main purpose is damage. (The second is primarily decided by the DM, but a good guideline is a [[SRD:Spells|spell]] that deals damage is one whose dice of damage at the minimum [[SRD:Casting_Spells#Caster_Level|caster level]] equal or exceed one's caster level. Examples include [[SRD:Scorching Ray|Scorching Ray]], [[SRD:Fireball|Fireball]], [[SRD:Cone of Cold|Cone of Cold]], and the like.)
A third exception to the rule is [[SRD:Dispel Magic|Dispel Magic]] (and its [[SRD:Greater Dispel Magic|Greater version]]) when used in the [[SRD:Casting_Spells#Dispel_Magic_as_a_Counterspell|dispellingcounterspelling]] capacity. If used thus, casting completes when the target's [[SRD:Spells|spell's]] casting is complete.
This also applies to the use of [[SRD:Magic_Items|magical items]] that reproduce [[SRD:Spells|spells]] and the like, allowing enemies to attempt to [[SRD:Sunder|destroy]] the object before the activation is complete.
