User blog comment:FairyRaven/Fairy Tail Chapter 363: The Stories That Demons Read, Review and Commentary/@comment-1153699-20131207173113/@comment-5668006-20131211231445

He didnt eat laxus' lightning if I remember correctly. Laxus gave him his power which just so happens to be lightning. Also, when he aye etherion im sure it has a lot of elements in it but I doubt Natsu will eat and absorb wind or water magic or anything else.