Board Thread:LOC General Discussion/@comment-5616072-20130806121457/@comment-5616072-20130827132111

LOC advised me that you DO get an element bonus for cards of your element in your main DEF line.

They stated that the benefit of the support lines was to put cards of other elements so you could get element bonuses for those elements as well... in addition to the element 'weakness' of the attacking player.

I asked them to clarify the amount of the ATK 'weakness' and that's when they stopped responding. =)