User blog comment:Woest/Element consumption by Slayers/@comment-5894890-20140729155718

Lol well this my way of thinking, donating blood- you can only take certain types of blood; lets say if your blood type B (you can take B/ or O blood, like taking normal fire, or another dragon slayers fire?), but can't take (AB or A, this would be like trying to take god slayer magic/ etherion?- except Natsu doesn't die from it like what blood would do :P- but of course it was harmful to his body, so lets forget the details and remember Natsu has the lungs of dragon or w/e, which allows him to do stuff above a average humans.). So now type AB can take blood from B, because it has the 'necessities' to handle it (ex. god slayer magic is superior to dragon slayer magic, that's why Zancrow could eat Natsu's flames?) uh... forget about type A lol. Now if Natsu ate his own fire, I think he would still be able to eat it... but it won't do anything? .. just a theory. it's like donating blood to yourself? o_o. Uhhh yeah... just trying to make something up, ignore this if it doesn't make sense lol.