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* Despite being [[unlimited]] itself, [[Guardian Elma]] is unable to be played with [[Advanced Format]] rules, because one of it's required [[summon]]ing card, [[Butterfly Dagger - Elma]], is [[Forbidden]].
** You can use her, however, by using [[Book of Taiyou]] since she is not [[Flip Summon]]ed, she is just [[flip]]ped [[face-up]].
