So as we know with all Final Fantasy Games especially the numbered series LOVE TO ALLUDE to the number in the title

15

But we only have 13(An obvious nod to the Versus Days) Royal Arms. But I'd like propose something with the ROYAL edition expansion. What if we are finally introduced to two more Royal Arms?

So what are these two Royal Arms

Well...Ardyn and Noctis'

So for Ardyn as seen in Episode Ignis Alternative Recipeh Storyline when we fight Ardyn he has a unique Royal Arm or at least a weapon colored like his royal arms...and it's a scythe. So what if this Weapon was a Royal Arm we could attain?

"The Scythe of The Accursed"

Now Noctis...

He's our main playable character, the newest King in his bloodline and you would think after being King or even after awakening from his 10 year long power nap that he would earn or be entitled to his own Royal Arm. Now we all know his trademark weapon is the Engine Blade which ultimately becomes the Ultima Sword...but what if with the new Royal Edition boss battle with the Rulers of Yore...it's a right of passage to attaining his Personal Royal Arm. He's presented with a unique weapon or The Ultima Blade gets upgraded once more by the Lucii to become

The Sword of The Chosen

And thus with these two new weapons the Armiger is now comprised of 15 Royal Arms alluding to the games NUMBER