Disclaimer: I don't own Game of Thrones; I intend for this to be a study on Dany's state of mind moments before she massacres the citizens of King's Landing.
Ring ring ring
The bells of surrender tolled, the once mighty Lannister army drops their weapons to the cold hard floor with a loud clang; the war is finally over, or so it seems. But these battle-weary soldiers have had enough of strife for the last few years, they desire peace under a potential conqueror; but alas, it may not happen.
Perched high up in the parapets, a hulking black dragon roars at dismayed smallfolk; its rider battling with an impending madness, a malaise passed down from her ancestors of yore. Her conscience trying to control her thirst for vengeance, she internally started to fight the thirst for vengeance.
"You are a benevolent ruler."
"Take what is yours by fire and blood!"
"No! Have mercy on innocent people! Only one person has ever wronged you!"
"Never! Unleash your dragon against these insects!"
"Please, don't do what you did to Lord Varys…"
"Varys was a traitor! He deserved it!"
"Mercy!"
"Remember Rhaegal! Remember Missandei!"
"You mustn't!"
"Dracarys!"
"No bloodshed!"
"Never! See the Red Keep, remember what was taken from you!"
Ring ring ring
At the sixth toll of the bell, the Dragon Queen unleashes a rain of fire and brimstone; burning thousands of fleeing people into unrecognizable burnt corpses. The flames unwittingly detonated the remaining cache of wildfire hidden since the Mad King's days, decimating almost all of King's Landing. Millions of people trapped in the capital certainly perished from the direct assault, a few more died from being crushed by the rubble from crumbling buildings; among them Queen Cersei and her twin brother Ser Jaime, leaving their youngest brother as the last surviving Lannister.
Dothraki screamers mow down fleeing citizens and the Unsullied brutally hacks down every single people they can find, but Jon Snow gave second thoughts about the carnage and hastily ordered his men to pull out from the soon to be incinerated King's Landing.
"Burn them all! Burn them all!"
The words of Aerys II rang true, what he opted to began ended with his now mad daughter; whose former benevolence replaced with all consuming bloodlust and desire for the Iron Throne, never a good sign in any Targaryen, when gods are even rumored to toss a coin whenever a new one was born.
"BURN THEM ALL!"
Deafening sounds of screaming died out as the call of death approaches, and while the city breathes its last agonizing breath; the triumphant queen circles around the once bustling city, now reduced to a smoldering pile of stones and horribly charred bodies.
"I took what is mine by fire and blood!"
She took what is hers by a hail of flames and bloodied swords, she is now undisputed Queen of the Seven Kingdoms; but for how long before she descends into the bowels of depravity.
What began as a quest to remake the world into a better place, ended up with a giant massacre of the innocents; scores of men, women, and children unnecessarily burnt and ruthlessly murdered.
"I am now Queen."
The Queen of Bloodlust and Ashes…