Read the faq... And for now, I'll tell you since... Let's say you are new. but don't let this repeat. So, you will need to import the spell itself (copy-paste it), copy-paste all dummy units used by the spell, other additional spells and most important, triggers/JASS triggers used for the spell. Eventually items might appear for the spell so if you must, add those items to your map as well.
~Daelin