Shyvana > Fiddlesticks: "I should have brought marshmallows.."

Shyvana > Maokai: "What a nice fire!"

Shyvana > Jarvan: "Hahah! Wait... uh oh.."

Tristana to Ziggs: "KABOooooohhhh....... god that looked painful.

Syndra to Irelia: So weak-willed ...
Syndra to Karma: Why conquer myself when I can just conquer them all?
Syndra to Shen: It seems the Eye of Twilight ... didn't see that coming
Syndra to Varus: So little power and still you can't control it?
Syndra to Soraka: The stars themselves are within my grasp
Syndra to Lee Sin: It seems that I possess both force and skill
Syndra to Udyr: Did I crush your spirit?
Syndra to Yi: The last master of Wuju? I'm not surprised. Pitiful.
Syndra to Kennen: You like big targets? I prefer yordles.
Syndra to Akali: I'll savour that one *laughs*
Syndra to Ahri: You did say not to hold back
Syndra to Zed: What's the matter, Zed? You seem a shadow of your former self

Shyvana to Ez: "Just as it says on the map, boy, 'Here there be dragons'!"
Yi to Karthus, mid Ult: "Wuju please keep it down?"

Rammus taunts everyone quotes would be hilarious.

Twitch to Teemo: And people call you a rodent? Pfaw! Insulting!
Twitch to Cho'Gath: I am an.. acquired taste.
Twitch to Shaco: You think you're crazy? Uehehehehehe!
Twitch to Elise: Oh no! Stay away from my little flies, you!
Twitch to Caitlyn: Ooh! I call her gun!

Bump for moderate justice.

Poppy to Jayce: That was REAL hammer diplomacy!

Lulu to Veigar: The funny man go boom! Hahahaha!

Vayne to Kog'Maw: *sigh* This league with riddled with freaks!

Rumble to Brand: It's hot in here, alright!

Darius to Garen: YOU'RE the staple of Demacia? Hah! I'll take every single one of you!

Not necessary a killing quote

Ezreal suviving Ace in The Hole

"Totally no skills there Cait."
"Chance of a headshot: zero percent."

While using Ace in the Hole with Ezreal nearby

"Sure we hit something this time"
"If they run in to the bush I will make sure they don't escape!"

Caitlyn taunts Ezreal

"Oh look, I all about skill. Charming little boy"
"You can't even hit the broad side of a pyramid let alone me"

Caitlyn taunts Jayce

"Jack of all trades, master of none."
"Is that hammer compensating for something?"

Fizz to Nami: Hum, sushi.
Diana to Leona: The sun always sets.
Leona to Diana: The sun is the only thing illuminating the moon.
Nidalee to Jayce: You need technology to do what I can do alone.