3e SRD:Creation Subschool
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The spell manipulates matter to create an object or creature in the place the spellcaster designates (subject to the limits noted above for conjurations). If the spell has a duration other than instantaneous, magic holds the creation together, and when the spell ends or is dispelled, the conjured creature or object vanishes without a trace. If the spell has an instantaneous duration, the created object or creature is merely assembled through magic. It lasts indefinitely and does not depend on magic for its existence.