User blog comment:CNBA3/Fairy Tail Civil War!/@comment-112.198.103.15-20160407112445/@comment-7418318-20160412162633

Actually it makes little sense for Gray to still try to kill E.N.D. once he knows it's Natsu.

Gray is supposed to be rather on the smart side, so he should easily be able to figure out that with Natsu being part of the guild almost always with other guild members, it couldn't have been E.N.D. who gave the orders, but actually Mard Geer himself who only used E.N.D. as a figurehead in his lies.

And thus his need to defeat E.N.D. would pretty much evaporate. Sure he promised Silver to kill E.N.D., but Silver wanted that because of Mard Geer's lies so that obligation should also end with the revealing of the truth.