From the "staredit tricks and tips"* section:
Broodling that Never Dies
Players:
¤ Players that you want
Conditions:
¤ The conditions that you want
Actions:
¤ Create "Amount" "Broodling" At "Any Location"
The trick is, don’t alter it in anyway, don’t give it invincibility, and don’t make it hallucinated, don’t create it with properties..etc.
* It doesn't work normally but there's a link posted as 'view this archive in printable form' which does the exact opposite and gives you source code. Copy the source code into a .html file and open it and you got the page

... in case anyone wants to know...
Perhaps I should post that as a new topic for everyone but I think I create too many as is... with all my questions

.