The Rogue Mage, Warden and Judicator. (NON-CANON)

Thresh: "The power you possess, angel, is naught but a nuisance to the might of the damned."
Kayle: "You can't be too powerful... you already died once."
Ryze: "The false power of the dead will never be fueled by the magic of Runeterra. You are ultimately subjected to lose."
Thresh: "Oh, I have died countless times in my existence, fools."
Thresh: "And with every so-called death, my link to this world grows ever tauter."
Thresh: "Death? Hah. I spit in the face of death upon a hourly basis."
Kayle: "Perhaps someone should smash that lantern of yours."
Ryze: "I wouldn't recommend that."
Thresh: "You are welcome to attempt it, witch."
Ryze: "To kill a weed, you need to pull it from the root."
Kayle: "Witch? Petty insults will get you no where, Warden."
Thresh: "I've nowhere to go, wench."
Thresh: "Nowhere to go but towards salvation."
Kayle: "Or to oblivion"
Kayle: "Where you belong."
Ryze: "Keep blabbering your mouth, Thresh. You won't, in fact have forever to use that power that fuels you."
Thresh: "Hah...ehahah...a feasible jest."
Ryze: "Salvation in the fires of hell."
Thresh: "I have stalked this world for near five hundred years, fool. Hell is the least of my concerns."
Ryze: "You are more than free to stalk this world for five hundred years more... From inside a sealed prison."
Kayle: "Five hundred years is as fast as a blink for me."
Thresh: "Oh, I am sure, my dear."
Thresh: "Five hundred years of enslavement for your people, though..."
Thresh: "Every one of them an eternity."
Kayle: "You say that like it's a curse. I proudly do it."
Ryze: "Until brought to rest by the end of slavery."
Thresh: "Tsk...what a farce."
Ryze: "You are powerless against us, Warden. Keep hiding behind your minions. Your final rest will come, and with it, an end to the slavery of the souls you locked in your lantern."
Thresh: "I hide behind no minions, scum. My cause is as righteous as any that this trash polluted world could hope to imagine."
Thresh: "I will set them free one day, and should I be unable to join them...then I shall happily pass beyond the veil."
Ryze: "An end to progress? To feelings? To living? Don't you miss living Thresh? Miss the warm breeze on a summer's day? Do you even remember? Or have your cruelty consumed you long ago?!"
Thresh: "My cruelty is a means to an end, insect. I shall win them back in due time, once my debt is paid."
Ryze: "A means to an end that you want? Or an end that you are enforced upon!?"
Thresh: "An end that my entire being calls out for, years for."
Ryze: "A being of what? You're nothing but a husk with a task! You're no better than automatons like that!"
Thresh: "Vengeance will be brought upon those who tormented me so in ages past, and the lost shall be remembered."
Ryze: "Remembered by who? The dead do not remember, they do not speak. They do."
Thresh: "Hah...how naive..."
Thresh: "There is life, there is death."
Thresh: "And then...there are we, the damned."
Ryze: "The damaged more likely. More close to dead than living."
Ryze: "A living thing thinks. You do not think, not for yourself. Your only goal is your master's plan."
Thresh: "Oh, I doubt your claims."
Ryze: "Then show me!"
Thresh: "My own goals have naught to do with the Ruined King's."
Thresh: "Until he can provide for me what...what was taken from me, I shall serve."
Ryze: "Hah, you really think he cares for you?! You are, as you said, just a means to an end."
Thresh: "I do not doubt that in the slightest, mage."
Thresh: "We are the instruments of his will, raised with purpose."
Ryze: "Then how can you claim you live? He is your maker, he will also be your ender."
Thresh: "I am hardly alive, mage."
Thresh: "I am an abomination, but an abomination that will never tire, never desist until what is owed to me is restored."
Ryze: "How can you claim /others/ will live? How can you claim they will find rest? In the end, if what you say will truly happen, the Ruined King shall rule over a Ruined Runeterra, with nothing but ashes and dead servants."
Ryze: "An abomination indeed. But you will /never/ get what was owed you. You are a slave, not a paid worker."
Thresh: "This world may burn in hell for all I care. Everything I once knew is gone, ripped from me by the same trash that is upheld as heroes and paragons of justice to this day."
Thresh: "I will do what I must, no matter the cost, if even I may simply see them once more."
Thresh: "And then...then I shall depart this world."
Ryze: "See them once? Why?! So they will ravel in your failure to move on? You want them to return to see the carnage you wrecked?"
Ryze: "You are a pathetic creature, Thresh."
Thresh: "Perhaps."
Thresh: "Perhaps, yes..."
Ryze: "If you truly seek those that you love, you won't find them here. Afterlife is your only chance and even then, the chances are slim. Reunification over judgement."
Ryze: "Its ironic isn't it? To feel pity over your enemy. I wish I could help you Thresh, merely so you can feel alive once again and know your false."
Thresh: "Oh, I am certain that in your infinite compassion and wisdom you would see fit as to send a being such as myself along the path to righteousness."
Ryze: "I am no judge. Your righteousness is as righteous as mine."
Ryze: "Let me ask you this: Who are you seeking?"
Thresh: "...in your readings, scholar, perhaps you have heard of a place, a secluded place upon the northeastern coast of Valoran."
Thresh: "A village, it was...such a quiet place."
Ryze: "Tell me more about the village."
Ryze: "Tell me those who wronged you."
Thresh: "The ones who wronged me...heh. They have already begun to pay, most dearly."
Ryze: "Then tell me of the ones you lost."
Thresh: "They...were a humble sort."
Thresh: "Every day of every season of every year was rather...blissful."
Thresh: "I was accepted by them, and they to I."
Ryze: "That feeling... You cannot feel it today can you?"
Thresh: "Bloodshed and agony have dulled the loss, certainly, but even seeing the world burn will never blot it out entirely."
Thresh: "With every death I have experienced in this existence, I see them again, fleetingly, just out of reach."
Ryze: "And your wish is to pay your debt, be released of the claws of death?"
Ryze: "See them again, but reach them and grab hold of them, joining them?"
Thresh: "I would be entirely contented in bringing them back from beyond the veil, or transcending this world entirely."
Ryze: "As much as I feel you... I do not think even your Ruined King could bring them back beyond the veil. Do you want them living? Or do you want them like you, an abomination?

Your best choice, is to join them beyond it, reaching, holding. Not letting go else the 'King' will grab hold of you again."
Thresh: "Hrm...perhaps, perhaps."
Thresh: "...heh. I would not be adverse to seeing my successor's work either."
Ryze: "You are irreplacable, Thresh."
Ryze: "You are cut beyond his regular minions."
Ryze: "You are his Warden, but he is /yours/."
Thresh: "Hmm."
Thresh: "Yes...yes he is."
Thresh: "And as of late...tsk, 'tis nothing."
Ryze: "Hmm. You deem it worthy enough to care about yourself."
Thresh: "I am only human, rogue mage. Or was, at least."
Ryze: "We all are. We make mistakes. The hardest part is to admit. Admit your mistake, Thresh. Even if you can't undo or stop. It will make passing away easier, as the mind knows more than the body allows it to."
Ryze: "I made myself mistakes, terrible ones. They were for my belief, be it true or false but I hurt people."
Thresh: "Hrm...what I have wrought can hardly be undone, but then..."
Thresh: "We shall see, I suppose."
Ryze: "Consideration. Reprecussion. Understanding. You are cut above his regular minions, that's for sure."
Thresh: "Mmm, perhaps. I shall ponder this discussion, certainly. I have much to think upon..."
Thresh: "...I shall consider it."
Thresh: [And with that, I ride off over the horizon.]

*Cough* tons of edits *cough*. Courtesy of Skype.