User blog comment:Miskos3/Fairy Tail 534: The Door to the Vow, Review/@comment-7418318-20170429073246

It's be ironically hilarious if through this connection with Natsu's book, Lucy would now be the one to transform into a Dragon, a Demon or a Dragon/Demon hybrid. ^^

I doubt it happens though... but it'd still be hilarious... Natsu would probably be delighted and envious too that Lucy now has spikes and scales and stuff like back in the Demon Island arc. ^^