Trigger Spell Question

Ok, I'm in the process of making some triggered spells for fun and i was wondering how you make a moving special effect wothout making it a unit. Like if I wanted to make a tornado effect move around without actually giving the tornado art to the unit, just making it a special effect. Anyways, if anyone knows how I'll greatly appreciate it. Thanx for your time.

Use offsets and create-remove all the way trough.

Regards
Dead-Inside

Ya, i was doing that but when its done in a map w/ lots of trigger based spells it causes lag. So, i was wondering if theres another way to do it or is that the only way

Why not make it a unit?

I don't see why it wouldn't work like a special effect all you need to do is give it the Aloc ability (It's called something dif now aparently) and it'll act like a special effect.