Welcome to Librarium Online!
Can you have say 2 squads of Red skullz? it doesn't say 0-1 and it would be just like using 2 o'shavas or 2 old one eyes.
they are a special character, ever heard of it perhaps
SIMPLY MEANING YOU CAN HAVE ONLY 1!
oops srry, chill out. i didn't know that because my 1 friend has used 2 o shavas and my other has used/uses 3 old one eyes.