User blog comment:Roranoa zoro/Eternal Flame,FT's foundin' members,Acnologia's DSE/@comment-10425110-20130714150934/@comment-1359322-20130715092529

Laxus and Cobra only had Dragon Slayer Lacrima inserted in them and they're using it like nothing. Also like you said, we have already seen 3 people with Dual Element, if we really consider that maybe the DS of the past had multiple element with them, if we consider that the fact that they were able to combat the Dragons more effectively then the current ones.