I don't mind if people submit untriggered\unJASSed spells (there is a section for it you know). BUT, this spell can cause an enormous amount of lag. It is, in a way, dangerous to large scale, and even small scale, maps. There can be a use for this though. I've seen a very well made survival map using this spell. You may want to add a trigger that removes excess units. For instance make it so there can only be 200 or so wisps at any given time. This of course could be done by whoever decides to use this spell.
Anyway, I prefer constructive critisism over blatant rudeness. So I cast no vote.
Why did u even bother wasting the time posting this spell... if everyone were to post stupid, untriggered spells right from the abilities editor, the spells sections would increase by at least a thousand.
The really sad part is your spell DOESN'T EVEN DO WHAT IT SAYS IN THE DESCRIPTION! If the wisp gets attacked and doesn't die, it won't split. How useless...
That is one way of doing it. However I did it an even simpler way to make it easier for noobs to recreate/change it my basing it on the spawn hydra spell and changing the spawned unit to the same unit that has the ability.
That spell isn't very hard to make, you just use the Unit is attacked event and the Create Unit action, that's all. And besides, this isn't one of the most useful spells on this site.