We’re not really strict about that stuff in this forum, so I’m okay with letting this go.
"The ancients knew how to deal with us, and did so so thoroughly that we were thought to only be a legend. Until you came, with your radiation, and burned away the stakes and the chains. Nothing human could have survived what you did to the Earth. Nothing human did.
Now, you will take us to your world, where your people will meet their new Masters."
“Bring on your army, Matthew and Alexandra, and I’ll show them all the awful things I’ve learned to do since I died.” - Jacob’s ghost, The Man With The Golden Torc
"And instead of a Dark Lord, you would have a Queen ! Not dark but beautiful and terrible as the dawn ! Treacherous as the sea ! *Stronger than the foundations of the Earth *! All shall love me and despair !
“Vorador was right. We are Gods - Dark Gods - and it is our duty, to thin the herd.” - Kain, Blood Omen
“When you lived in caves, we gave you everything you are. And now, we take it back.” - Overheard comment from one of the genocidal Hylden to a human slave who’s begging for mercy.
And from real life:
“I want you to just let a wave of intolerance wash over you. I want you to let a wave of hatred wash over you. Yes, hate is good … if a Christian voted for Clinton, he sinned against God. It’s that simple. Our goal is a Christian nation. We have a biblical duty, we are called by God to conquer this country” - former leader of Operation Rescue Randall Terry
“Remedy the situation, or you will live out your life in a pain amplifier!”
The Guild Navigator to Emperor Shaddam IV, in David Lynch’s Dune.
The idea of being forced to live in a “pain amplifier” is pretty spooky.
Here’s an oldie that’s hard to go past:
ARBEIT MACHT FREI
Personally, I’ve always loved Galadriel’s moment in LOTR - you know, when Frodo freely offers her the Ring.
I’m always a little disappointed, whether reading or watching the film, that she “passes the test” and refuses her temptation.
I guess I just really like the idea of a powerful dark queen 
/edit “All shall love me and despair!” is like the best quote ever.
"Revenge ! Revenge? You? The King Under the Mountain is dead and where are his kin that dare seek revenge ? Girion Lord of Dale is dead and I have eaten his people like a wolf among sheep, and where are his son’s son’s that dare approach me ? I kill where I wish and none dare resist. I laid low the warriors of old and their like is not in the world today. Then I was but young and tender. Now I am old and strong, strong, STRONG ! Thief in the Shadows. My armor is like tenfold shields, my teeth are swords, my claws spears, the shock of my tail a thunderbolt, my wings are a hurricane, and my breath . . . DEATH ! " - Smaug, The Hobbit
"When I come to her, she will be safe, unharmed, and free. Because I will come to her. And if she is not, I will destroy “Her Undying Majesty”, melt what is left of your miserable island into slag, and BOIL THE SEAS AROUND YOU FOR THE NEXT THOUSAND YEARS! Do you understand?!
“You…you couldn’t!”
“Couldn’t?! COULDN’T?! I am Gilgamesh Wulfenbach little man, and there is NOTHING I couldn’t do, had I cause. And now, now I have one! Do. You. Understand?!”
Gilgamesh Wulfenbach, Girl Genius.
“Obviously a major malfunction”.
“We understand there has been a plane crash on the southern tip of Manhattan…”
“Houston, we have a problem.”
“Zombie. Closed.”
Reopened, due to several requests.
shrug
“Lock the doors.”
I think we’re gonna need a bigger boat.
“You will never touch the boy” she said, nearly in a whisper. “You will never think about touching the boy. Because if you do… you will wonder why your friend, death, took so long to find you.” - Empire’s End
Then the killers departed, having gone in with the long knife, and come out leaving nothing but blood and silence behind them. - Vortex
“Indeed, I tremble for my country when I reflect that God is just, and His justice can not sleep forever.” Thomas Jefferson
“If you go down in the woods today, you’re sure of a big surprise
If you go down in the woods today, you’d better go in disguise…”
(hey, I always found it kind of ominous)
The bandit Calvera explains to the Magnificent Seven why he must continue to plunder the poor peasants’ farms, pointing out that to fail to do so may even be blasphemous:
“If God did not mean for them to be shorn he would not have made them sheep.”
“We shall all go through into the world of mortal men, in all our awful glory, without having to be summoned. After so very, very long, our time has come round at last. We’re coming in force, to overthrow the upstart reason and crush the tyrant science. Logic and order, cause and effect, and all the other constraints on our freedom shall be swept aside, and the Wild Magic shall once again have dominion over every unfortunate living thing. Once the Blue Moon’s orbit has intersected with your own moon once again, we will all cross over and remake your world in our own hating image. Then there shall be chaos, loose in the world like a wolf in the fold, for forever and a day. And oh, the terrible pleasures we shall take in the world that used to be yours.” : Beyond the Blue Moon
“They were vast and they were ancient and they were monsters. Their nature blazed forth from them, unhidden by any trace of self-deception. They knew what they were, what they had made of themselves and they gloried in it. They were evil, evil as an almost pure concept, hating everything that wasn’t them. Because the only thing they wouldn’t or couldn’t feed on was each other. They ate life, not just for sustenance but for the sheer joy of destroying it. Antigods, concerned only with consuming creation.” : Daemons Are Forever, the description of the Hungry Gods.
“The powers that I may wield are vaster than those of many gods that humans have worshiped. There is not a man I meet but I could take his life. There is not a world I pause on that I could not lay waste utterly, or remake as I choose. I am the Lord God, or as much of one as either of you is likely to ever encounter.” : Tuf Voyaging
“Please accept my assurances that no personal animosity of any kind is intended towards any of you. Nonetheless it appears, unfortunately that I must now go forth and destroy your respective worlds. Perhaps you would like to draw straws, to determine where I might best start.” : Tuf Voyaging
From “The Teddy Bears’ Picnic”.
O-kaaaaayyyy…
“You be very careful, Ransom. I’m down in the bottom of a big black hole. No, I’m not, though. I’m on Perelandra. I can’t think very well now, but that doesn’t matter, he does all my thinking for me. It’ll get quite easy presently. That boy keeps on shutting the windows. That’s all right, they’ve taken off my head and put someone else’s on me. I’ll soon be all right now. They won’t let me see my press cuttings. So then I went and told him that if they didn’t want me in the First Fifteen they could jolly well do without me, see. We’ll tell that young whelp it’s an insult to the examiners to show up this kind of work. What I want to know is why I should pay for a first-class ticket and then be crowded out like this. It’s not fair. Not fair. I never meant any harm. Could you take some of this weight off my chest, I don’t want all those clothes. Let me alone. Let me alone. It’s not fair. It’s not fair. What enormous bluebottles. They say you get used to them.”
“Look at you, hacker. A pathetic creature of meat and bone. Panting and sweating as you run through my corridors. How can you challenge a perfect immortal machine?”
- SHODAN (not our Shodan, though.
)
Ehhh. I’ve heard worse.