Sure, but chances are Silver learned the Etherious kind of DeS magic.
I don't think Igneel means the same kind of darkness Invel does.
Sure, any human can possess pretty much any magic, but not everyone does. Darkness is specifically related to Zeref's and Gray's DeS magic, it's not the same as PoF
They do, since Tartaros END has been hyped to kill Zeref, END Natsu himself specifically said he was going to kill Zeref. Zeref sent Natsu to the future in anticipation that he would one day end him. Zeref also can't just release END as far as we know, it has to be done naturally. In fact Zeref tried to kill Makarov and Gray specifically so END would kill him.
As for Natsu's love for the guild being the stronger force, yeah, sure, sure, but in that instance he was using the power of the guild, with his mark flashing and all that, that ain't normal PoF.
There is for me. As for why we're limiting her to her human form, because her dragon form is squarely above Erza, and we're as a whole, comparing Erza to END in this argument, not the various forms of Eileen.
As for the meteor, I wouldn't put it above what END or Gray could smash either, so Erza going in for a meteor splitting slash isn't the end of the world for those two. And even if they couldn't smash the meteor, just means they have lower attack power, which isn't everything. For instance, they both have higher durability than her.
Really? As I recall END was specifically mentioned, though tbh i dont remember much of the film.