Board Thread:General Discussion/@comment-24674051-20150420171129/@comment-25926288-20150420171654

I agree. That will be like one of the many little limits. When Zelena did her decoy/illusion spell. She had to break it to do a fireball. I think that people can't do magic in a glamour, except break it (But Cora did magic when she was glamoured to look like Regina) So, if we ignore that, everyone else including Rumple follows this rule.