Talk:Thunder Empire/@comment-35718699-20180615220731/@comment-11372432-20180615222241

Well, the “generic” Gargantua Dragon cards (the base forms) are usable with any flag, but that’s about it, as this also bars the more “traditional” generic cards.

So, in short, only Thunder Empire and cards that explicitly say you can use them with any flag in the effect can be used with this flag.