User blog comment:Tatsuya Kurodake here yo!/How many times can you attack in one turn? (Best formation)/@comment-26916515-20151123232358/@comment-11372432-20151123235317

Great Barrier only applies to the field. The English translation is terrible. Japanese card specifies field only.

That said, Alter Ego Asmodai with Devil Fever nets you 9 attacks and even more if you can somehow fill the drop after casting Fever.