In Fairy Tail 100 Years Quest episode 13 ... Erza, wielding the power of Natsu’s Fire Dragon Flames and Gray’s Ice Devil Chill, matches Laxus' Red Lightning Dragon Mode in a heated duel ...

The sheet-metal giant has spikes running down its long neck to its pointy tail. The dragon’s little arms and wings do little to defend it, but that doesn’t matter — it’s got fire.