[Question] The dragon Kings

[Olorin]

So we recently found out that Igneel is the fire dragon king. Do you think that Grandine and Metallicana are the Iron DK and Sky DK? How about Vicelogia and Skiadrum (or however they are spelled)?

 

[Hollow9tailsEye]

Possibly that's why those are the main dragon slayers. But I says that just maybe just maybe Igneel and Acnolgia are related somehow. That's why Zeref knew Natsus name.

 

[BlueMeteor]

it seems highly likely.

 

[Caliburn]

Then Metallicana would be more the metal dragon king or even the earth dragon king as I doubt that there are many forms of iron.

And I'm pretty sure all dragons know Acnologia and are somehow connected to it, it's the Dragon King after all.