Isterio said:
Ok before people rally and scream.
THIS MAKES NO SENSE BULLSHIT ASSPULL POWERUP.
What happened here is actually sensical within the realm of Fairy Tails rules and the power up gained through this has been used before in a different way several times.
It´s not Dragon Force alone, though a partial component is Dragon Force, as proven by the design. According to the translation this mode is a mixture between Gray´s "curse mode" and Dragon Force.
Probably Hiro´s way of putting Gajeel on a smilar level with Natsu and Gray again, because he doesn´t consider one rival to be sufficient.
Why is this mode neither one or the other? Because the established rules for Dragon Force were to consume particles of the Dragon Slayers element with highly condensed magic particles attached to it.Wendy achieved it by eating air near face. Natsu achieved it by eating Etherion or the sacred flame.Gajeel never had eaten an enhanced version of his element till now.This power up makes more sense in the context of the story compared to the asspull steel power up during Tartaros.
Nonetheless he should die due to "curse particle" poisoning by just activating Dragon Force, but if the audience accepts that Gray is immune and even capable of blocking curses this should come as no surprise. What happened here was Gajeel achieving Dragonforce/Devil slayer traits, therefore the immunity.
I don't think he'll die... there's this novel where Gajeel and Levy's kids came back to the past and pun people, or something like that... I know it's a novel and it shouldn't be classified as canon, but if something happened and Mashima acknowledged this novel, Levy would survive and Gajeel will die revealing that she's pregnant. That would be pretty sad. BUT I don't see it happening.