Previously in the MCU
Doctor Strange
"You think you know how the world works? You think that this material universe is all there is? What is real? What mysteries lie beyond the reach of your senses? At the root of existence, mind and matter meet. Thoughts shape reality. This universe is only one of an infinite number. Worlds without end. Some benevolent and life-giving, others filled with malice and hunger. Dark places, where powers older than time lie… ravenous… and waiting. Who are you in this vast multiverse, Mr. Strange?" (The Ancient One)
"You've been away many months now and I heard a revelation. The true purpose of a sorcerer is to twist things out of there proper shape. Stealing power, providing nature…like you. I see what was wrong with the world. Too many sorcerers." (Mordo)
Infinity War
"Spare his life… and I'll give you the stone." "We are in the endgame now." "Tony, there was no other way." (Dr. Strange)
Endgame
"If I tell you what happens, it won't happen." (Dr. Strange)
WandaVision
"As a carbon-based synthezoid, your memory storage is not so easily wiped. May I?" (Hex Vision)
"I am Vision." (White Vision)
"Wanda, you've never been up against another witch before. Did you know there's an entire chapter devoted to you in the Darkhold? That's the book of the damned. "The Scarlet Witch is not born, she is forged. She has no coven, no need for incantation." "Your power exceeds that of the Sorcerer Supreme. It's your destiny to destroy the world." (Agatha Harkness)
"I'm not a witch. I don't cast spells. No one taught me magic!" (Wanda Maximoff)
"Oh, God. You don't know what you've done." "You… You have… You have no idea what you've unleashed. You're gonna need me." (Agatha Harkness)
"If I do, I know where to find you." (Wanda Maximoff)
A Witch's Judgement Day
"You were never sorry that you trapped us, you only apologized because you got caught." "Everyday spent in that... red anomaly was Hell on Earth." "Your escapist fantasy came at the cost of our free will!" "In there we were nothing but passive spectators in our own bodies. Behind those happy smiles was soul-crushing misery, we were forced to relive our most painful memories, our grief, and our trauma. You controlled our every action, repeating the same tasks repeatedly, and we knew something was going on but we couldn't do anything to stop it!" "Right after you freed Westview, some people committed suicide only minutes later." "We'd rather die than spend another day under your control and nobody knew if you were going to stay in Westview." "You think SWORD is wrong for how they treated you but after everything you have done what did you expect them to do? And I'm not just talking about Westview." "You have power that no one can comprehend and you have proven that you will hurt people to get what you want." "Was any of this worth it?" (Robert)
"Wanda Maximoff, we have been made aware of your misuse of Chaos Magic in Westview. You will come with us to Kamar-Taj and from there the Masters of the Mystic Arts will decide your fate." (Wong)
"The Scarlet Witch, a being that has the power to warp reality as we know it. I thought you were just a myth, but now I know who you are and where you are hiding. You are too dangerous to be left alive. When the time is right, for the sake of the Multiverse... I will end this threat once and for all." (Mordo)